Late transition metal catalysts for olefin polymerization and oligomerization

• US 20060047094A1
• Filed: 07/17/2003
• Published: 03/02/2006
• Est. Priority Date: 07/17/2002
• Status: Active Grant

• Current Assignee: ExxonMobil Chemical Patents Inc. (Exxon Mobil Corporation)
• Original Assignee: ExxonMobil Chemical Patents Inc. (Exxon Mobil Corporation)
• Inventors: Zhao, Baiyi, Canich, Jo Ann Marie, Berluche, Enock, Baugh, Lisa, Schulz, Donald Norman, Ballinger, Cynthia A., Druzhkov, Nikolay Olegovich, Bubnov, Michael Paviovich, Glushakova, Valentina Nikolavena, Teplova, Irina Alexandrovna, Cherkasov, Vladimir Kuzunich, Abakumov, Gleb Arsent'evich, Squire, Kevin A., Skorodumova, Nina Alekssandrovna
• Granted Patent: US 7,247,687 B2
• Time in Patent Office: Days
• US Class Current: 526/172
• CPC Class Codes: B01J 2231/12 Olefin polymerisation or copolymerisation
• CPC Class Codes: B01J 2531/845 Cobalt
• CPC Class Codes: B01J 2531/847 Nickel
• CPC Class Codes: B01J 31/0214 Aryloxylates, e.g. phenolates
• CPC Class Codes: B01J 31/1805 the ligands containing nitrogen
• CPC Class Codes: B01J 31/1815 with more than one complexing nitrogen atom, e.g. bipyridyl, 2-aminopyridine
• CPC Class Codes: C07F 15/0066 without a metal-carbon linkage
• CPC Class Codes: C07F 15/045 without a metal-carbon linkage
• CPC Class Codes: C07F 15/065 without a metal-carbon linkage
• CPC Class Codes: C08F 10/00 Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
• CPC Class Codes: C08F 210/06 Propene
• CPC Class Codes: C08F 210/14 Monomers containing five or more carbon atoms
• CPC Class Codes: C08F 210/16 Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
• CPC Class Codes: C08F 2410/03 Multinuclear procatalyst, i.e. containing two or more metals, being different or not
• CPC Class Codes: C08F 2500/03 Narrow molecular weight distribution, i.e. Mw/Mn < 3
• CPC Class Codes: C08F 4/025 Metal oxides
• CPC Class Codes: C08F 4/52 selected from boron, aluminium, gallium, indium, thallium or rare earths C08F4/14 takes precedence
• CPC Class Codes: C08F 4/7004 Neutral ligand
• CPC Class Codes: C08F 4/7006 NN
• CPC Class Codes: C08F 4/7027 OO
• CPC Class Codes: C08F 4/7037 : OO
• CPC Class Codes: C08F 4/7042 : NNN

Abstract

This invention relates to a transition metal compound represented by the formula LMX wherein M is a Group 3 to 11 metal L is a bulky bidentate or tridentate neutral ligand that is bonded to M by two or three heteroatoms and at least one heteroatom is nitrogen; X is a substituted or unsubstituted catecholate ligand provided that the substituted catecholate ligand does not contain a 1,2-diketone functionality.

Claims

1. A transition metal compound represented by the formula LMX wherein M is a Group 3 to 11 metal L is a bulky bidentate or tridentate neutral ligand that is bonded to M by two or three heteroatoms and at least one heteroatom is nitrogen;

X is a substituted or unsubstituted catecholate ligand provided that the substituted catecholate ligand does not contain a 1,2-diketone functionality.

2. The compound of claim 1 where M is a Group 8, 9, 10 or 11 metal.

3. The compound of claim 1 wherein M is Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag or Au.

4. The compound of claim 1 wherein M is Fe, Co, Ni or Pd.

5. The compound of any of the above claims wherein L is not a ligand selected from the group consisting of:

substituted and unsubstituted 2,2′

-bipyridyl, 2,2′

-biquinolinyl, 2,2′

-bipyrazinyl, 1,10-phenanthroline, dipyridin-2-yl-amine, dipyridin-2-yl-methane, N′

-(2-amino-ethyl)ethane-1,2-diamine, N¹-(3-amino-propyl)propane-1,3-diamine, ethane-1,2-diamine, propane-1,3-diamine, cyclohexane-1,2-diamine, N,N,N,N′

-tetramethylethane-1,2-diamine, methyl-(2-methyliminoethylidene)amine, N,N′

-bis(napthalen-1-ylmethylene)ethane-1,2-diamine, N,N ′

-bis(napthalen-1-ylmethylene)propane-1,3-diaamine, N,N′

-dibenzylidene-propane-1,3-diamine, N¹-napthalen-1-ylmethylene-ethane-1,2-diamine, 2-[(3-amino-propylimino)methyl]phenol, 2,4,4-trimethyl-1,5,9-triaza-cyclododec-1-ene, 1,4,7-trimethyl-[1,4,7]triazonane, [2,2′

;

6′

2″

]terpyridine, N-[2-dimethylaminoethyl)-N,N′

,N ′

-trimethylethane-1,2-diaamine, cyclopenta[2,1-b;

3,4-b′

]dipyridin-5-one, 2-(2-pyridylsulfanyl)pyridine, 2-(2-pyridyloxy)pyridine, benzyl-bis(pyridin-2-ylmethyl)amine, 2-pyridin-2-yl-quinoxaline, N′

-ethylidene-ethane-1,2-diamine, and bis(1H-benzoimidazol-2-ylmethyl)amine where substitution refers to replacing one or more existing hydrogen atoms bonded to carbon with another atom or group of atoms; and

1,4-diaza-1,3-butadiene ligands containing substituents in the 2 and or 3 positions containing trihydrocarbylsiloxy groups.

6. The compound of any of the above claims where L is represented by the formulae:

7. The compound of any of claims 1, 2, 3, 4, or 5 where L is represented by the formulae L*1 to L*410:

where

R¹ is, independently, a bulky hydrocarbyl, substituted bulky hydrocarbyl, bulky halocarbyl, or substituted bulky halocarbyl;

R² is, independently, hydrogen, or a hydrocarbyl, substituted hydrocarbyl, halocarbyl, or substituted halocarbyl provided that a substituted hydrocarbyl is not substituted with trihydrocarbylsiloxy;

R³ is, independently, hydrogen, or a hydrocarbyl, substituted hydrocarbyl, halocarbyl, or substituted halocarbyl provided that a substituted hydrocarbyl is not substituted with trihydrocarbylsiloxy, or R³ is a substituted hydrocarbyl group containing a heteroatom or silicon atom directly bonded to G, E or the indicated carbon atom;

R²² is, independently, hydrogen, or a hydrocarbyl, substituted hydrocarbyl, halocarbyl, or substituted halocarbyl provided that a substituted hydrocarbyl is not substituted with trihydrocarbylsiloxy;

and where

R¹, R² and/or R³ groups on the same atom, adjacent atoms or those separated by one additional atom may join together to form a substituted or unsubstituted, saturated, partially unsaturated or aromatic cyclic or polycyclic ring structure provided that for L1, both pair of R¹ and R² do not join to form a substituted or unsubstituted pyridine, pyrazine, pyrimidine or benzimidazole ring;

R²² and R³ may join together to form a substituted or unsubstituted, saturated, partially unsaturated or aromatic heterocyclic ring structure provided that for L21 and L22, R¹ and R² do not join to form a substituted or unsubstituted pyridine, pyrazine, pyrimidine or benzimidazole ring; and

two R² bonded to the same atom together may form an -one (═

O), a thione (═

S), an -imine (═

NR′

″

), or a -carbene (═

CR′

″

₂) group where R′

″

is independently, hydrogen, hydrocarbyl, substituted hydrocarbyl, halocarbyl or substituted halocarbyl and two or more R′

″

on the same carbon may join together to form a substituted or unsubstituted, saturated, partially unsaturated, or aromatic cyclic or polycyclic substituent.

8. The compound of claim 6 or 7, where R¹ is selected from the group consisting of:

all isomers and hydrocarbyl substituted isomers of propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, heneicosyl, docosyl, tricosyl, tetracosyl, pentacosyl, hexacosyl, heptacosyl, octacosyl, nonacosyl, triacontyl, propenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl, nonadecenyl, eicosenyl, heneicosenyl, docosenyl, tricosenyl, tetracosenyl, pentacosenyl, hexacosenyl, heptacosenyl, octacosenyl, nonacosenyl, triacontenyl, propynyl, butynyl, pentynyl, hexynyl, heptynyl, octynyl, nonynyl, decynyl, undecynyl, dodecynyl, tridecynyl, tetradecynyl, pentadecynyl, hexadecynyl, heptadecynyl, octadecynyl, nonadecynyl, eicosynyl, heneicosynyl, docosynyl, tricosynyl, tetracosynyl, pentacosynyl, hexacosynyl, heptacosynyl, octacosynyl, nonacosynyl, and triacontynyl;

perfluoropropyl, perfluorobutyl, perfluoropentyl, perfluorohexyl, perfluoroheptyl, perfluorooctyl, perfluorononyl, perfluorodecyl, perfluoroundecyl, perfluorododecyl, perfluorotridecyl, perfluorotetradecyl, perfluoropentadecyl, perfluorohexadecyl, perfluoroheptadecyl, perfluorooctadecyl, perfluorononadecyl, perfluoroeicosyl, perfluoroheneicosyl, perfluorodocosyl, perfluorotricosyl, perfluorotetracosyl, perfluoropentacosyl, perfluorohexacosyl, perfluoroheptacosyl, perfluorooctacosyl, perfluorononacosyl, perfluorotriacontyl, perfluorobutenyl, perfluorobutynyl, fluoropropyl, fluorobutyl, fluoropentyl, fluorohexyl, fluoroheptyl, fluorooctyl, fluorononyl, fluorodecyl, fluoroundecyl, fluorododecyl, fluorotridecyl, fluorotetradecyl, fluoropentadecyl, fluorohexadecyl, fluoroheptadecyl, fluorooctadecyl, fluorononadecyl, fluoroeicosyl, fluoroheneicosyl, fluorodocosyl, fluorotricosyl, fluorotetracosyl, fluoropentacosyl, fluorohexacosyl, fluoroheptacosyl, fluorooctacosyl, fluorononacosyl, fluorotriacontyl, difluorobutyl, trifluorobutyl, tetrafluorobutyl, pentafluorobutyl, hexafluorobutyl, heptafluorobutyl, octafluorobutyl;

methoxypropyl, methoxybutyl, methoxypentyl, methoxyhexyl, methoxyheptyl, methoxyoctyl, methoxynonyl, methoxydecyl, methoxyundecyl, methoxydodecyl, methoxytridecyl, methoxytetradecyl, methoxypentadecyl, methoxyhexadecyl, methoxyheptadecyl, methoxyoctadecyl, methoxynonadecyl, methoxyeicosyl, methoxyheneicosyl, methoxydocosyl, methoxytricosyl, methoxytetracosyl, methoxypentacosyl, methoxyhexacosyl, methoxyheptacosyl, methoxyoctacosyl, methoxynonacosyl, methoxytriacontyl, butoxypropyl, butoxybutyl, butoxypentyl, butoxyhexyl, butoxyheptyl, butoxyoctyl, butoxynonyl, butoxydecyl, butoxyundecyl, butoxydodecyl, butoxytridecyl, butoxytetradecyl, butoxypentadecyl, butoxyhexadecyl, butoxyheptadecyl, butoxyoctadecyl, butoxynonadecyl, butoxyeicosyl, butoxyheneicosyl, butoxydocosyl, butoxytricosyl, butoxytetracosyl, butoxypentacosyl, butoxyhexacosyl, butoxyheptacosyl, butoxyoctacosyl, butoxynonacosyl, butoxytriacontyl, dimethylaminopropyl, dimethylaminobutyl, dimethylaminopentyl, dimethylaminohexyl, dimethylaminoheptyl, dimethylaminooctyl, dimethylarninononyl, dimethylaminodecyl, dimethylaminoundecyl, dimethylaminododecyl, dimethylaminotridecyl, dimethylaminotetradecyl, dimethylaminopentadecyl, dimethylamninohexadecyl, dimethylaminoheptadecyl, dimethylaminooctadecyl, dimethylaminononadecyl, dimethylaminoeicosyl, dimethylaminoheneicosyl, dimethylaminodocosyl, dimethylaminotricosyl, dimethylaminotetracosyl, dimethylaminopentacosyl, dimethylaminohexacosyl, dimethylaminoheptacosyl, dirmethylraminooctacosyl, dimethylaminononacosyl, dimethylaminotriacontyl, trimethylsilylpropyl, trimethylsilylbutyl, trimethylsilylpentyl, trimethylsilylhexyl, trimethylsilylheptyl, trimethylsilyloctyl, trimethylsilylnonyl, trimethylsilyldecyl, trimethylsilylundecyl, trimethylsilyldodecyl, trimethylsilyltridecyl, trimethylsilyltetradecyl, trimethylsilylpentadecyl, trimethylsilylhexadecyl, trimethylsilylheptadecyl, trimethylsilyloctadecyl, trimethylsilylnonadecyl, trimethylsilyleicosyl, trimethylsilylheneicosyl, trimethylsilyldocosyl, trimethylsilyltricosyl, trimethylsilyltetracosyl, trimethylsilylpentacosyl, trimethylsilylhexacosyl, trimethylsilylheptacosyl, trimethylsilyloctacosyl, trimethylsilylnonacosyl, trimethylsilyltriacontyl, methylphenyl, dimethylphenyl, trimethylphenyl, tetramethylphenyl, pentamethylphenyl ethylphenyl, diethylphenyl, triethylphenyl, tetraethylphenyl, pentaethylphenyl, propylphenyl, dipropylphenyl, tripropylphenyl, tetrapropylphenyl, pentapropylphenyl butylphenyl, dibutylphenyl, tributylphenyl, tetrabutylphenyl, pentabutylphenyl, hexylphenyl, dihexylphenyl, trihexylphenyl, tetrahexylphenyl, pentahexylphenyl, dimethylethylphenyl, dimethylpropylphenyl, dimethylbutylphenyl, dimethylpentylphenyl, dimethylhexylphenyl, diethylmethylphenyl, diethylpropylphenyl, diethylbutylphenyl, diethylpentylphenyl, diethylhexylphenyl, dipropylmethylphenyl, dipropylethylphenyl, dipropylbutylphenyl, dipropylpentylphenyl, dipropylhexylphenyl, dibutylmethylphenyl, dibutylethylphenyl, dibutylpropylphenyl, dibutylpentylphenyl, dibutylhexylphenyl, methylethylphenyl, methylpropylphenyl, methylbutylphenyl, methylpentylphenyl, methylhexylphenyl, ethylpropylphenyl, ethylbutylphenyl, ethylpentylphenyl, ethylhexylphenyl, propylbutylphenyl, propylpentylphenyl, propylhexylphenyl, butylpentylphenyl, butylhexylphenyl, methoxyphenyl, ethoxyphenyl, propoxyphenyl, butoxyphenyl, pentoxyphenyl, hexoxyphenyl, dimethoxyphenyl, phenoxyphenyl, methylmethoxyphenyl, dimethylaminophenyl, dipropylaminophenyl, bis(dimethylamino)phenyl, methyl(dimethylamino)phenyl, trimethylsilylphenyl, trimethylgermylphenyl, trifluoromethylphenyl, bis(triflouromethyl)phenyl, trifluoromethoxyphenyl, halophenyl, dihalophenyl, trihalophenyl, tetrahalophenyl, and pentahalophenyl, halomethylphenyl, dihalomethylphenyl, trihalomethylphenyl, tetrahalomethylphenyl, haloethlyphenyl, dihaloethylphenyl, trihaloethylphenyl, tetrahaloethylphenyl, halopropylphenyl, dihalopropylphenyl, trihalopropylphenyl, tetrahalopropylphenyl, halobutylphenyl, dihalobutylphenyl, trihalobutylphenyl, tetrahalobutylphenyl, dihalodimethylphenyl, dihalo(trifluoromethyl)phenyl (where halo is, independently, fluoro, chloro, bromo and iodo), methylbenzyl, dimethylbenzyl, trimethylbenzyl, tetramethylbenzyl, pentamethylbenzyl ethylbenzyl, diethylbenzyl, triethylbenzyl, tetraethylbenzyl, pentaethylbenzyl, propylbenzyl, dipropylbenzyl, tripropylbenzyl, tetrapropylbenzyl, pentapropylbenzyl butylbenzyl, dibutylbenzyl, tributylbenzyl, tetrabutylbenzyl, pentabutylbenzyl, hexylbenzyl, dihexylbenzyl, trihexylbenzyl, tetrahexylbenzyl, pentahexylbenzyl, dimethylethylbenzyl, dimethylpropylbenzyl, dimethylbutylbenzyl, dimethylpentylbenzyl, dimethylhexylbenzyl, diethylmethylbenzyl, diethylpropylbenzyl, diethylbutylbenzyl, diethylpentylbenzyl, diethylhexylbenzyl, dipropylmethylbenzyl, dipropylethylbenzyl, dipropylbutylbenzyl, dipropylpentylbenzyl, dipropylhexylbenzyl, dibutylmethylbenzyl, dibutylethylbenzyl, dibutylpropylbenzyl, dibutylpentylbenzyl, dibutylhexylbenzyl, methylethylbenzyl, methylpropylbenzyl, methylbutylbenzyl, methylpentylbenzyl, methylhexylbenzyl, ethylpropylbenzyl, ethylbutylbenzyl, ethylpentylbenzyl, ethylhexylbenzyl, propylbutylbenzyl, propylpentylbenzyl, propylhexylbenzyl, butylpentylbenzyl, butylhexylbenzyl, methoxybenzyl, ethoxybenzyl, propoxybenzyl, butoxybenzyl, pentoxybenzyl, hexoxybenzyl, dimethoxybenzyl, phenoxybenzyl, methylmethoxybenzyl, dimethylaminobenzyl, dipropylaminobenzyl, bis(dimethylamino)benzyl, methyl(dimethylamino)benzyl, trifluoromethylbenzyl, bis(trifluoromethylbenzyl), trifluoromethyoxybenzyl, trimethylsilylbenzyl, bis(trimethylsilyl)benzyl, trimethylgermylbenzyl, diphenylmethyl, trimethylsilyl, trimethylgermyl, trimethylstannyl, trimethylplumbyl, triethylsilyl, triethylgermyl, dimethylethylsilyl, dimethylethylgermyl, diethylmethylsilyl, diethylmethylgermyl, triphenylsilyl, triphenylgermyl, triphenoxysilyl, triphenoxygermyl, trimethoxysilyl, trimethoxygermyl, triethoxysilyl, triethoxygermyl, and all isomers of tripropylsilyl, tripropylgermyl, tributylsilyl, tributylgermyl, tripropoxysilyl, tripropoxygermyl, tributoxysilyl, tributoxygermyl, tris(trifluornethyl)silyl, bis(perfluoromethyl)methylsilyl, pyrenyl, aceanthrylenyl, acenaphthylene, acephenanthrylenyl, azulenyl biphenylenyl, chrysenyl, coronenyl, fluoranthenyl, fluorenyl, heptacenyl, heptalenyl, heptaphenyl, hexacenyl, hexaphenyl, as-indacenyl, s-indecenyl, indenyl, ovalenyl, pentacenyl, pentalenyl, pentaphenyl, perylenyl, phenalenyl, phenanthrenyl, picenyl, pleiadenyl, pyranhrenyl, rubicenyl, naphthacenyl, tetraphenylenyl, trinaphthylenyl, triphenylenyl, hexahelicenyl, naphthyl, anthracenyl, dibenza[a,b]anthracenyl, indanyl, acenaphthenyl, cholanthrenyl, aceanthrenyl, acephenanthrenyl, 1,2,3,4-tetrahydronapthalene, fullerenyl, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclohexenyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, cycloundecyl, and cyclododecyl, dimethylcyclohexyl, norbomyl, norbornenyl, adamantyl, cubanyl, prismanyl, spiro[4,5]decanyl, biphenyl, bicyclopentyl, terphenyl, quatercyclohexanyl, binaphthyl, binorbornyl, phenyl-terphenyl, 1,1-diphenylmethano, 1,1-dinapthyletheno, acridarsinyl, acridinyl, acridophosphinyl, 1H-acrindolinyl, anthrazinyl, anthyridinyl, arsanthridinyl, arsindolyl, arsindolizinyl, arsinolinyl, arsinolizinyl, benzofuranyl, carbazolyl, β

-carbolinyl, chromenyl, thiochromenyl, cinnolinyl, furanyl, imidazolyl, indazolyl, indolyl, indolizinyl, isoarsindolyl, isoarsinolinyl, isobenzofuranyl, isochromenyl, isothiochromenyl, isoindolyl, isophosphindolyl, isophosphinolinyl, isoquinolinyl, isothiazolyl, isoxazolyl, naphthyridinyl, oxazolyl, perimidinyl, phenanthrazinyl, phenanthridinyl, phenanthrolinyl, phenazinyl, phosphanthridinyl, phosphindolyl, phosphindolizinyl, phosphinolizinyl, phthalazinyl, pteridinyl, phthaloperinyl, purinyl, pyranyl, thiopyranal, pyrazinyl, pyrazolyl, pyridazinyl, pyridinyl, pyrindinyl, pyrimidinyl, pyrrolyl, pyrrolizinyl, quinazolinyl, quindolinyl, 1H-quinindolinyl, quinolinyl, quinolizinyl, quinoxalinyl, selenophenyl, thebenidinyl, thiazolyl, thiophenyl, triphenodioxazinyl, triphenodithiazinyl, xanthenyl, chromanyl, thiochromanyl, imidazolidinyl, indolinyl, isochromanyl, isothiochromanyl, isoindolinyl, morpholinyl, piperazinyl, piperidinyl, pyrozolidinyl, pyrrolidinyl, quinuclidinyl, dimethylacridarsinyl, dimethylacridinyl, dimethylacridophosphinyl, dimethyl-1H-acrindolinyl, dimethylanthrazinyl, dimethylanthyridinyl, dimethylarsanthridinyl, dimethylarsindolyl, dimethylarsindolizinyl, dimethylarsinolinyl, dimethylarsinolizinyl, dibutylbenzofuranyl, dibutylcarbazolyl, dibutyl-β

-carbolinyl, dibutylchromenyl, dibutylthiochromenyl, butylcinnolinyl, dibutylfuranyl, dimethylimidazolyl, dimethylindazolyl, dipropylindolyl, dipropylindolizinyl, dimethylisoarsindolyl, methylisoarsinolinyl, dimethylisobenzofuranyl, diphenylisochromenyl, dibutylisothiochromenyl, phenylisoindolyl, butylisophosphindolyl, dibutylisophosphinolinyl, dimethylisoquinolinyl, methylisothiazolyl, butylisoxazolyl, butylnaphthyridinyl, dimethyloxazolyl, methylphenylperimidinyl, tetrabutylphenanthrazinyl, propylphenanthridinyl, dibutylphenanthrolinyl, tetrarnethylphenazinyl, butylphosphanthridinyl, phenylphosphindolyl, dimethylphosphindolizinyl, methylphosphinolizinyl, dibutylphthalazinyl, trimethylpteridinyl, methylphthaloperinyl, dimethylpurinyl, dibutylpyranyl, dibutylthiopyranal, trimethylpyrazinyl, phenylpyrazolyl, dipropylpyridazinyl, dimethylpyridinyl, methylpropylpyrindinyl, triethylpyrimidinyl, dibutylpyrrolyl, diethylpyrrolizinyl, dibutylquinazolinyl, dibutylquindolinyl, dibutyl-1H-quinindolinyl, dimethylquinolinyl, propylquinolizinyl, methylquinoxalinyl, methylbutylselenophenyl, methylthebenidinyl, dimethylthiazolyl, trimethylthiophenyl, dibutyltriphenodioxazinyl, dibutyltriphenodithiazinyl, dibutylxanthenyl, trimethylchromanyl, dimethylthiochromanyl, dimethylimidazolidinyl, dimethylindolinyl, dibutylisochromanyl, dibutylisothiochromanyl, phenylisoindolinyl, dibutylmorpholinyl, dimethylpiperazinyl, dimethylpiperidinyl, dimethylpyrozolidinyl, dimethylpyrrolidinyl, bipyridyl, pyrido[2,1,6-de]quinolizinyl, hexamethylquinuclidinyl, 5,7-dioxa-6-phosphadibenzo[a,c]cycloheptene-6-oxide, and 9-oxa-10-phosphaphenanthrene-10-oxide.

9. The compound of claim 6 where A is represented by the following formulae:

R′

₂C, R′

₂Si, R′

₂Ge, R′

₂CCR′

₂, R′

₂CCR′

₂CR′

₂, R′

₂CCR′

₂CR′

₂CR′

₂, R′

C═

CR′

, R′

C═

CR′

CR′

₂, R′

₂CCR′

═

CR′

CR′

₂, R′

C═

CR′

CR′

═

CR′

, R′

C═

CR′

CR′

₂CR′

₂, R′

₂CSiR′

₂, R′

₂SiSiR′

₂, R′

₂CSiR′

₂CR′

₂, R′

₂SiCF′

₂SiR′

₂, R′

C═

CR′

SiR′

₂, R′

₂CGeR′

₂, R′

₂GeGeR′

₂, R′

₂CGeR′

₂CR′

₂, R′

₂GeCR′

₂GeR′

₂, R′

₂SiGeR′

₂, R′

C═

CR′

GeR′

₂, R′

B, R′

₂C—

BR′

, R′

₂C—

BR′

—

CR′

₂, R′

N, R′

P, O, S, Se, C(═

O)C(═

O), R′

₂CC(═

O), R′

₂CC(═

O)CR′

₂, R′

₂C—

O—

CR′

₂, R′

₂CR′

₂C—

O—

CR′

₂CR′

₂, R′

₂C—

O—

CR′

₂CR′

₂, R′

₂C—

O—

CR′

═

CR′

, R′

₂C—

S—

CR′

₂, R′

₂CR′

₂C—

S—

CR′

₂CR′

₂, R′

₂C—

S—

CR′

₂CR′

₂, R′

₂C—

S—

CR′

═

CR′

, R′

₂C—

Se—

CR′

₂, R′

₂CR′

₂C—

Se—

CR′

₂CR′

₂, R′

₂C—

Se—

CR′

₂CR′

₂, R′

₂C—

Se—

CR′

═

CR′

, R′

₂C—

N═

CR′

, R′

₂C—

NR′

—

CR′

₂, R′

₂C—

NR′

—

CR′

₂CR′

₂, R′

₂C—

NR′

—

CR′

═

CR′

, R′

₂CR′

₂C—

NR′

—

CR′

₂CR′

₂, R′

₂C—

P═

CR′

, and R′

₂C—

PR′

—

CR′

₂ where each R′

is, independently, hydrogen, hydrocarbyl, substituted hydrocarbyl, halocarbyl or substituted halocarbyl provided that a substituted hydrocarbyl is not substituted with trihydrocarbylsiloxy, and two or more R′

on the same carbon or adjacent R′

may join together to form a substituted or unsubstituted, saturated, partially unsaturated, or aromatic cyclic or polycyclic substituent.

10. The compound of claim 6 where A is represented by the formulae:

11. The compound of claim 6 or 7 where R¹ is represented by the formulae:

12. The composition of claim 11 wherein R¹⁰, R¹¹, R¹², and R¹³ are, independently selected from the group consisting of:

hydrogen, methyl, ethyl, ethenyl, ethynyl and all isomers of propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, heneicosyl, docosyl, tricosyl, tetracosyl, pentacosyl, hexacosyl, heptacosyl, octacosyl, nonacosyl, triacontyl, propenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl, nonadecenyl, eicosenyl, heneicosenyl, docosenyl, tricosenyl, tetracosenyl, pentacosenyl, hexacosenyl, heptacosenyl, octacosenyl, nonacosenyl, triacontenyl, propynyl, butynyl, pentynyl, hexynyl, heptynyl, octynyl, nonynyl, decynyl, undecynyl, dodecynyl, tridecynyl, tetradecynyl, pentadecynyl, hexadecynyl, heptadecynyl, octadecynyl, nonadecynyl, eicosynyl, heneicosynyl, docosynyl, tricosynyl, tetracosynyl, pentacosynyl, hexacosynyl, heptacosynyl, octacosynyl, nonacosynyl, triacontynyl, perfluoropropyl, perfluorobutyl, perfluoropentyl, perfluorohexyl, perfluoroheptyl, perfluorooctyl, perfluorononyl, perfluorodecyl, perfluoroundecyl, perfluorododecyl, perfluorotridecyl, perfluorotetradecyl, perfluoropentadecyl, perfluorohexadecyl, perfluoroheptadecyl, perfluorooctadecyl, perfluorononadecyl, perfluoroeicosyl, perfluoroheneicosyl, perfluorodocosyl, perfluorotricosyl, perfluorotetracosyl, perfluoropentacosyl, perfluorohexacosyl, perfluoroheptacosyl, perfluorooctacosyl, perfluorononacosyl, perfluorotriacontyl, perfluorobutenyl, perfluorobutynyl, fluoropropyl, fluorobutyl, fluoropentyl, fluorohexyl, fluoroheptyl, fluorooctyl, fluorononyl, fluorodecyl, fluoroundecyl, fluorododecyl, fluorotridecyl, fluorotetradecyl, fluoropentadecyl, fluorohexadecyl, fluoroheptadecyl, fluorooctadecyl, fluorononadecyl, fluoroeicosyl, fluoroheneicosyl, fluorodocosyl, fluorotricosyl, fluorotetracosyl, fluoropentacosyl, fluorohexacosyl, fluoroheptacosyl, fluorooctacosyl, fluorononacosyl, fluorotriacontyl, difluorobutyl, trifluorobutyl, tetrafluorobutyl, pentafluorobutyl, hexafluorobutyl, heptafluorobutyl, octafluorobutyl, methoxypropyl, methoxybutyl, methoxypentyl, methoxyhexyl, methoxyheptyl, methoxyoctyl, methoxynonyl, methoxydecyl, methoxyundecyl, methoxydodecyl, methoxytridecyl, methoxytetradecyl, methoxypentadecyl, methoxyhexadecyl, methoxyheptadecyl, methoxyoctadecyl, methoxynonadecyl, methoxyeicosyl, methoxyheneicosyl, methoxydocosyl, methoxytricosyl, methoxytetracosyl, methoxypentacosyl, methoxyhexacosyl, methoxyheptacosyl, methoxyoctacosyl, methoxynonacosyl, methoxytriacontyl, butoxypropyl, butoxybutyl, butoxypentyl, butoxyhexyl, butoxyheptyl, butoxyoctyl, butoxynonyl, butoxydecyl, butoxyundecyl, butoxydodecyl, butoxytridecyl, butoxytetradecyl, butoxypentadecyl, butoxyhexadecyl, butoxyheptadecyl, butoxyoctadecyl, butoxynonadecyl, butoxyeicosyl, butoxyheneicosyl, butoxydocosyl, butoxytricosyl, butoxytetracosyl, butoxypentacosyl, butoxyhexacosyl, butoxyheptacosyl, butoxyoctacosyl, butoxynonacosyl, butoxytriacontyl, dimethylaminopropyl, dimethylaminobutyl, dimethylaminopentyl, dimethylaminohexyl, dimethylaminoheptyl, dimethylaminooctyl, dimethylaminononyl, dimethylaminodecyl, dimethylaminoundecyl, dimethylaminododecyl, dimethylaminotridecyl, dimethylaminotetradecyl, dimethylaminopentadecyl, dimethylaminohexadecyl, dimethylaminoheptadecyl, dimethylaminooctadecyl, dimethylaminononadecyl, dimethylaminoeicosyl, dimethylaminoheneicosyl, dimethylaminodocosyl, dimethylaminotricosyl, dimethylaminotetracosyl, dimethylaminopentacosyl, dimethylaminohexacosyl, dimethylaminoheptacosyl, dimethylaminooctacosyl, dimethylaminononacosyl, dimethylaminotriacontyl, trimethylsilylpropyl, trimethylsilylbutyl, trimethylsilylpentyl, trimethylsilylhexyl, trimethylsilylheptyl, trimethylsilyloctyl, trimethylsilylnonyl, trimethylsilyldecyl, trimethylsilylundecyl, trimethylsilyldodecyl, trimethylsilyltridecyl, trimethylsilyltetradecyl, trimethylsilylpentadecyl, trimethylsilylhexadecyl, trimethylsilylheptadecyl, trimethylsilyloctadecyl, trimethylsilylnonadecyl, trimethylsilyleicosyl, trimethylsilylheneicosyl, trimethylsilyldocosyl, trimethylsilyltricosyl, trimethylsilyltetracosyl, trimethylsilylpentacosyl, trimethylsilylhexacosyl, trimethylsilylheptacosyl, trimethylsilyloctacosyl, trimethylsilylnonacosyl, trimethylsilyltriacontyl, phenyl, methylphenyl, dimethylphenyl, trimethylphenyl, tetramethylphenyl, pentamethylphenyl ethylphenyl, diethylphenyl, triethylphenyl, tetraethylphenyl, pentaethylphenyl, propylphenyl, dipropylphenyl, tripropylphenyl, tetrapropylphenyl, pentapropylphenyl butylphenyl, dibutylphenyl, tributylphenyl, tetrabutylphenyl, pentabutylphenyl, hexylphenyl, dihexylphenyl, trihexylphenyl, tetrahexylphenyl, pentahexylphenyl, dimethylethylphenyl, dimethylpropylphenyl, dimethylbutylphenyl, dimethylpentylphenyl, dimethylhexylphenyl, diethylmethylphenyl, diethylpropylphenyl, diethylbutylphenyl, diethylpentylphenyl, diethylhexylphenyl, dipropylmethylphenyl, dipropylethylphenyl, dipropylbutylphenyl, dipropylpentylphenyl, dipropylhexylphenyl, dibutylmethylphenyl, dibutylethylphenyl, dibutylpropylphenyl, dibutylpentylphenyl, dibutylhexylphenyl, methylethylphenyl, methylpropylphenyl, methylbutylphenyl, methylpentylphenyl, methylhexylphenyl, ethylpropylphenyl, ethylbutylphenyl, ethylpentylphenyl, ethylhexylphenyl, propylbutylphenyl, propylpentylphenyl, propylhexylphenyl, butylpentylphenyl, butylhexylphenyl, trimethylsilylphenyl, trimethylgermylphenyl, trifluoromethylphenyl, bis(triflouromethyl)phenyl, halophenyl, dihalophenyl, trihalophenyl, tetrahalophenyl, pentahalophenyl;

halomethylphenyl, dihalomethylphenyl, trihalomethylphenyl, tetrahalomethylphenyl, haloethlyphenyl, dihaloethylphenyl, trihaloethylphenyl, tetrahaloethylphenyl, halopropylphenyl, dihalopropylphenyl, trihalopropylphenyl, tetrahalopropylphenyl, halobutylphenyl, dihalobutylphenyl, trihalobutylphenyl, tetrahalobutylphenyl, dihalodimethylphenyl, dihalo(trifluoromethyl)phenyl (where halo is, independently, fluoro, chloro, bromo and iodo), benzyl, methylbenzyl, dimethylbenzyl, trimethylbenzyl, tetramethylbenzyl, pentarnethylbenzyl ethylbenzyl, diethylbenzyl, triethylbenzyl, tetraethylbenzyl, pentaethylbenzyl, propylbenzyl, dipropylbenzyl, tripropylbenzyl, tetrapropylbenzyl, pentapropylbenzyl butylbenzyl, dibutylbenzyl, tributylbenzyl, tetrabutylbenzyl, pentabutylbenzyl, hexylbenzyl, dihexylbenzyl, trihexylbenzyl, tetrahexylbenzyl, pentahexylbenzyl, dimethylethylbenzyl, dimethylpropylbenzyl, dimethylbutylbenzyl, dimethylpentylbenzyl, dimethylhexylbenzyl, diethylmethylbenzyl, diethylpropylbenzyl, diethylbutylbenzyl, diethylpentylbenzyl, diethylhexylbenzyl, dipropylmethylbenzyl, dipropylethylbenzyl, dipropylbutylbenzyl, dipropylpentylbenzyl, dipropylhexylbenzyl, dibutylmethylbenzyl, dibutylethylbenzyl, dibutylpropylbenzyl, dibutylpentylbenzyl, dibutylhexylbenzyl, methylethylbenzyl, methylpropylbenzyl, methylbutylbenzyl, methylpentylbenzyl, methylhexylbenzyl, ethylpropylbenzyl, ethylbutylbenzyl, ethylpentylbenzyl, ethylhexylbenzyl, propylbutylbenzyl, propylpentylbenzyl, propylhexylbenzyl, butylpentylbenzyl, butylhexylbenzyl, trimethylsilylbenzyl, bis(trimethylsilyl)benzyl, trimethylgermylbenzyl, diphenylmethyl, trimethylsilyl, trimethylgermyl, trimethylstannyl, trimethylplumbyl, triethylsilyl, triethylgermyl, dimethylethylsilyl, dimethylethylgermyl, diethylmethylsilyl, diethylmethylgermyl, triphenylsilyl, triphenylgermyl, tripropylsilyl, tripropylgermyl, tributylsilyl, tributylgermyl, tris(trifluormethyl)silyl, bis(perfluoromethyl)methylsilyl, pyrenyl, aceanthrylenyl, acenaphthylene, acephenanthrylenyl, azulenyl biphenylenyl, chrysenyl, coronenyl, fluoranthenyl, fluorenyl, heptacenyl, heptalenyl, heptaphenyl, hexacenyl, hexaphenyl, as-indacenyl, s-indecenyl, indenyl, ovalenyl, pentacenyl, pentalenyl, pentaphenyl, perylenyl, phenalenyl, phenanthrenyl, picenyl, pleiadenyl, pyranhrenyl, rubicenyl, naphthacenyl, tetraphenylenyl, trinaphthylenyl, triphenylenyl, hexahelicenyl, naphthyl, anthracenyl, dibenza[a,b]anthracenyl, indanyl, acenaphthenyl, cholanthrenyl, aceanthrenyl, acephenanthrenyl, 1,2,3,4-tetrahydronapthalene, fullerenyl, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclohexenyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, cycloundecyl, and cyclododecyl, dimethylcyclohexyl, norbornyl, norbornenyl, adamantyl, cubanyl, prismanyl, spiro[4,5]decanyl, biphenyl, bicyclopentyl, terphenyl, quatercyclohexanyl, binaphthyl, binorbornyl, phenyl-terphenyl, 1,1-diphenylmethano, 1,1-dinapthyletheno, acridarsinyl, acridinyl, acridophosphinyl, 1H-acrindolinyl, anthrazinyl, anthyridinyl, arsanthridinyl, arsindolyl, arsindolizinyl, arsinolinyl, arsinolizinyl, benzofuranyl, carbazolyl, β

-carbolinyl, chromenyl, thiochromenyl, cinnolinyl, furanyl, imidazolyl, indazolyl, indolyl, indolizinyl, isoarsindolyl, isoarsinolinyl, isobenzofuranyl, isochromenyl, isothiochromenyl, isoindolyl, isophosphindolyl, isophosphinolinyl, isoquinolinyl, isothiazolyl, isoxazolyl, naphthyridinyl, oxazolyl, perimidinyl, phenanthrazinyl, phenanthridinyl, phenanthrolinyl, phenazinyl, phosphanthridinyl, phosphindolyl, phosphindolizinyl, phosphinolizinyl, phthalazinyl, pteridinyl, phthaloperinyl, purinyl, pyranyl, thiopyranal, pyrazinyl, pyrazolyl, pyridazinyl, pyridinyl, pyrindinyl, pyrimidinyl, pyrrolyl, pyrrolizinyl, quinazolinyl, quindolinyl, 1H-quinindolinyl, quinolinyl, quinolizinyl, quinoxalinyl, selenophenyl, thebenidinyl, thiazolyl, thiophenyl, triphenodioxazinyl, triphenodithiazinyl, xanthenyl, chromanyl, thiochromanyl, imidazolidinyl, indolinyl, isochromanyl, isothiochromanyl, isoindolinyl, morpholinyl, piperazinyl, piperidinyl, pyrozolidinyl, pyrrolidinyl, quinuclidinyl, dimethylacridarsinyl, dimethylacridinyl, dimethylacridophosphinyl, dimethyl-1H-acrindolinyl, dimethylanthrazinyl, dimethylanthyridinyl, dimethylarsanthridinyl, dimethylarsindolyl, dimethylarsindolizinyl, dimethylarsinolinyl, dimethylarsinolizinyl, dibutylbenzofuranyl, dibutylcarbazolyl, dibutyl-,-carbolinyl, dibutylchromenyl, dibutylthiochromenyl, butylcinnolinyl, dibutylfuranyl, dimethylimidazolyl, dimethylindazolyl, dipropylindolyl, dipropylindolizinyl, dimethylisoarsindolyl, methylisoarsinolinyl, dimethylisobenzofuranyl, diphenylisochromenyl, dibutylisothiochromenyl, phenylisoindolyl, butylisophosphindolyl, dibutylisophosphinolinyl, dimethylisoquinolinyl, methylisothiazolyl, butylisoxazolyl, butylnaphthyridinyl, dimethyloxazolyl, methylphenylperimidinyl, tetrabutylphenanthrazinyl, propylphenanthridinyl, dibutylphenanthrolinyl, tetramethylphenazinyl, butylphosphanthridinyl, phenylphosphindolyl, dimethylphosphindolizinyl, methylphosphinolizinyl, dibutylphthalazinyl, trimethylpteridinyl, methylphthaloperinyl, dimethylpurinyl, dibutylpyranyl, dibutylthiopyranal, trimethylpyrazinyl, phenylpyrazolyl, dipropylpyridazinyl, dimethylpyridinyl, methylpropylpyrindinyl, triethylpyrimidinyl, dibutylpyrrolyl, diethylpyrrolizinyl, dibutylquinazolinyl, dibutylquindolinyl, dibutyl-1H-quinindolinyl, dimethylquinolinyl, propylquinolizinyl, methylquinoxalinyl, methylbutylselenophenyl, methylthebenidinyl, dimethylthiazolyl, trimethylthiophenyl, dibutyltriphenodioxazinyl, dibutyltriphenodithiazinyl, dibutylxanthenyl, trimethylchromanyl, dimethylthiochromanyl, dimethylimidazolidinyl, dimethylindolinyl, dibutylisochromanyl, dibutylisothiochromanyl, phenylisoindolinyl, dibutylmorpholinyl, dimethylpiperazinyl, dimethylpiperidinyl, dimethylpyrozolidinyl, dimethylpyrrolidinyl, bipyridyl, pyrido[2,1,6-de]quinolizinyl, hexarnethylquinuclidinyl, 5,7-dioxa-6-phosphadibenzo[a,c]cycloheptene-6-oxide, 9-oxa-10-phosphaphenanthrene-10-oxide, methoxy, ethoxy, propoxy, butoxy, pentoxy, phenoxy, dimethylphenoxy, dimethylamino, diethylamino, dipropylamino, methylethylamino, methylpropylamino, ethylpropylamino, diphenylamino, methylphenylamino, and ethylphenylamino.

13. The compound of claim 11 where at least one R¹¹ and/or at least one R¹² are independently methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, iso-butyl, tert-butyl, phenyl, napthyl, diphenylmethyl, or trifluoromethyl.

14. The compound of claim any of the above claims wherein X is represented by the formulae:

15. The compound of claim 1 where the transition metal compound is [1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butylcatecholate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butylcatecholate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-iso-propylcatecholate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-dimethylcatecholate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene) nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate],

[1,4-bis-(2,6-di-iso-propylphenyl)-1,4-dia-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butylcatecholate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butylcatecholate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-I ,4-diaza-1,3-butadiene) nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-iso-propylcatecholate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo [1,4]dioxine-2,3-diolate],

[2,3-dimethyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butylcatecholate],

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate),

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate),

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene) nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butylcatecholate],

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate),

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-iso-propylcatecholate],

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate),

[2-methyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diza-1,3-butadiene]nickel(II) [3,6-di-tert-butylcatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate),

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butylcatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-iso-propylcatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo [1,4]dioxine-2,3-diolate],

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-3-propyl-1,4-bis-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butylcatecholate],

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,5-di-tert-butylcatecholate],

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate),

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-iso-propylcatecholate],

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate),

[1,2-bis-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate),

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butylcatecholate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butylcatecholate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-iso-propylcatecholate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-dimethylcatecholate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate],

[1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butylcatecholate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butylcatecholate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-iso-propylcatecholate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo [1,4]dioxine-2,3-diolate],

[2,3-dimethyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butylcatecholate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl4-cyclohexylcatecholate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butylcatecholate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-iso-propylcatecholate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butylcatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butylcatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene) nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-iso-propylcatecholate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-3-propyl-1,4-bis-(2,6-dimethylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butylcatecholate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene) nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene]nickel(II) [3,5-di-tert-butylcatecholate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene]nickel(II) [3,6-di-iso-propylcatecholate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate],

[1,2-bis-(2,6-dimethylphenylimino)acenaphthene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butylcatecholate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate),

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butylcatecholate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-iso-propylcatecholate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-dimethylcatecholate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(I1) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate],

[1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[2,3-dimethyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butylcatecholate],

[2,3-dimethyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[2,3-dimethyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[2,3-dimethyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[2,3-dimethyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[2,3-dimethyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[2,3-dimethyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[2,3-dimethyl-1-(2,6-diethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[2,3-dimethyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[2,3-dimethyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butylcatecholate],

[2,3-dimethyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[2,3-dimethyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[2,3-dimethyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[2,3-dimethyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-iso-propylcatecholate],

[2,3-dimethyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[2,3-dimethyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate],

[2,3-dimethyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butylcatecholate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butylcatecholate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-iso-propylcatecholate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butylcatecholate],

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butylcatecholate],

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,4,6-tri-iso-propylcatecholate),

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-iso-propylcatecholate],

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-3-propyl-1-(2,6-dimethylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butylcatecholate],

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate),

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,5-di-tert-butylcatecholate],

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-iso-propylcatecholate],

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo [1,4]dioxine-2,3-diolate],

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate],

[1-(2,6-dimethylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butylcatecholate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butylcatecholate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-iso-propylcatecholate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-dimethylcatecholate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate],

[1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butylcatecholate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-bromocatecholate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dibromocatecholate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butylcatecholate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-iso-propylcatecholate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate],

[2,3-dimethyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di -iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butylcatecholate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butylcatecholate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-iso-propylcatecholate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butylcatecholate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butylcatecholate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [3,6-di-iso-propylcatecholate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate],

[2-methyl-3-propyl-1-(2,5-di-tert-butylphenyl)-4-(2,6-di-iso-propylphenyl)-1,4-diaza-1,3-butadiene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butylcatecholate],

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-chlorocatecholate],

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-fluorocatecholate],

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4,5-difluorocatecholate],

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-methoxycatecholate],

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-iso-propylcatecholate),

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-tert-butyl-4-cyclohexylcatecholate],

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,5-di-tert-butylcatecholate],

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,5-di-tert-butyl-6-chlorocatecholate],

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,5-di-tert-butyl-6-nitrocatecholate],

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,4,6-tri-iso-propylcatecholate],

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [3,6-di-iso-propylcatecholate),

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [1,4,6,8-tetra-tert-butyldibenzo[1,4]dioxine-2,3-diolate],

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [1,4,6,7,8,9-hexachlorodibenzo[1,4]dioxine-2,3-diolate],

[1-(2,5-di-tert-butylphenylimino)-2-(2,6-di-iso-propylphenylimino)acenaphthene]nickel(II) [1,4,6,7,8,9-hexabromodibenzo[1,4]dioxine-2,3-diolate],

[1,2-bis-(2,6-dimethylphenylimino)-cyclohexane]nickel(II) [3,6-di-tert-butylcatecholate],

[2,3-bis-(2,6-dimethylphenylimino)-[1,4]dithiane]nickel(II) [3,6-di-tert-butylcatecholate],

[2,3-bis-(2,6-dimethylphenylimino)-piperazine]nickel(II) [3,6-di-tert-butylcatecholate],

[1,4-dimethyl-2,3-bis-(2,6-dimethylphenylimino)-piperazine]nickel(II) [3,6-di-tert-butylcatecholate],

[2,3-bis-(2,6-dimethylphenylimino)-bicyclo[2.2.1]-heptane) nickel(II) [3,6-di-tert-butylcatecholate),

[1,4-dimethyl-2,3-bis-(2,6-dimethylphenylimino)-[1,4]diazepane]nickel(II) [3,6-di-tert-butylcatecholate],

[1-methyl-2,3-bis-(2,6-dimethylphenylimino)-cyclopentane]nickel(II) [3,6-di-tert-butylcatecholate],

[5-methyl-2,3-bis-(2,6-dimethylphenylimino)-tetrahydrofuran]nickel(II) [3,6-di-tert-butylcatecholate),

[5-methyl-2,3-bis-(2,6-dimethylphenylimino)-2,3-dihydrohydrofuran]nickel(II) [3,6-di-tert-butylcatecholate],

[1,2-bis-(2,6-di-iso-propylphenylimino)-cyclohexane]nickel(II) [3,6-di-tert-butylcatecholate],

[2,3-bis-(2,6-di-iso-propylphenylimino)-[1,4]dithiane]nickel(II) [3,6-di-tert-butylcatecholate],

[2,3-bis-(2,6-di-iso-propylphenylimino)-piperazine]nickel(II) [3,6-di-tert-butylcatecholate],

[1,4-dimethyl-2,3-bis-(2,6-di-iso-propylphenylimino)-piperazine]nickel(II) [3,6-di-tert-butylcatecholate],

[2,3-bis-(2,6-di-iso-propylphenylimino)-bicyclo[2.2.1]-heptane]nickel(II) [3,6-di-tert-butylcatecholate],

[1,4-dimethyl-2,3-bis-(2,6-di-iso-propylphenylimino)-[1,4]diazepane]nickel(II) [3,6-di-tert-butylcatecholate],

[1-methyl-2,3-bis-(2,6-di-iso-propylphenylimino)-cyclopentane]nickel(II) [3,6-di-tert-butylcatecholate],

[5-methyl-2,3-bis-(2,6-di-iso-propylphenylimino)-tetrahydrofuran]nickel(II) [3,6-di-tert-butylcatecholate],

[5-methyl-2,3-bis-(2,6-di-iso-propylphenylimino)-2,3-dihydrohydrofuran]nickel(II) [3,6-di-tert-butylcatecholate],

[1-(2,6-di-iso-propylphenylimino)-2-(2,6-dimethylphenylimino)-cyclohexane]nickel(II) [3,6-di-tert-butylcatecholate],

[2-(2,6-di-iso-propylphenylimino)-3-(2,6-dimethylphenylimino)-[1,4]dithiane]nickel(II) [3,6-di-tert-butylcatecholate],

[2-(2,6-di-iso-propylphenylimino)-3-(2,6-dimethylphenylimino)-piperazine]nickel(II) [3,6-di-tert-butylcatecholate],

[1,4-dimethyl-2-(2,6-di-iso-propylphenylimino)-3-(2,6-dimethylphenylimino)-piperazine]nickel(II) [3,6-di-tert-butylcatecholate],

[2-(2,6-di-iso-propylphenylimino)-3-(2,6-dimethylphenylimino)-bicyclo[2.2.1]-heptane]nickel(II) [3,6-di-tert-butylcatecholate],

[1,4-dimethyl-2-(2,6-di-iso-propylphenylimino)-3-(2,6-dimethylphenylimino)-[1,4]diazepane]nickel(II) [3,6-di-tert-butylcatecholate],

[1-methyl-2-(2,6-di-iso-propylphenylimino)-3-(2,6-dimethylphenylimino)-cyclopentane]nickel(II) [3,6-di-tert-butylcatecholate],

[5-methyl-2-(2,6-di-iso-propylphenylimino)-3-(2,6-dimethylphenylimino)-tetrahydrofuran]nickel(II) [3,6-di-tert-butylcatecholate],

[5-methyl-2-(2,6-di-iso-propylphenylimino)-3-(2,6-dimethylphenylimino)-2,3-dihydrohydrofuran]nickel(II) [3,6-di-tert-butylcatecholate],

[1-(2,6-di-iso-propylphenylimino)-2-(2,5-di-tert-butylphenylimino)-cyclohexane]nickel(II) [3,6-di-tert-butylcatecholate],

[2-(2,6-di-iso-propylphenylimino)-3-(2,5-di-tert-butylphenylimino)-[1,4]dithiane]nickel(II) [3,6-di-tert-butylcatecholate],

[2-(2,6-di-iso-propylphenylimino)-3-(2,5-di-tert-butylphenylimino)-piperazine]nickel(II) [3,6-di-tert-butylcatecholate],

[1,4-dimethyl-2-(2,6-di-iso-propylphenylimino)-3-(2,5-di-tert-butylphenylimino)-piperazine]nickel(II) [3,6-di-tert-butylcatecholate],

[2-(2,6-di-iso-propylphenylimino)-3-(2,5-di-tert-butylphenylimino)-bicyclo[2.2.1]-heptane]nickel(II) [3,6-di-tert-butylcatecholate],

[1,4-dimethyl-2-(2,6-di-iso-propylphenylimino)-3-(2,5-di-tert-butylphenylimino)-[1,4]diazepane]nickel(II) [3,6-di-tert-butylcatecholate],

[1-methyl-2-(2,6-di-iso-propylphenylimino)-3-(2,5-di-tert-butylphenylimino)-cyclopentane]nickel(II) [3,6-di-tert-butylcatecholate],

[5-methyl-2-(2,6-di-iso-propylphenylimino)-3-(2,5-di-tert-butylphenylimino)-tetrahydrofuran]nickel(II) [3,6-di-tert-butylcatecholate],

[5-methyl-2-(2,6-di-iso-propylphenylimino)-3-(2,5-di-tert-butylphenylimino)-2,3-dihydrohydrofuran]nickel(II) [3,6-di-tert-butylcatecholate],

[1,2-bis-(2,6-dimethylphenylimino)-cyclohexane]nickel(II) [3,5-di-tert-butylcatecholate],

[2,3-bis-(2,6-dimethylphenylimino)-[1,4]dithiane]nickel(II) [3,5-di-tert-butylcatecholate],

[2,3-bis-(2,6-dimethylphenylimino)-piperazine]nickel(II) [3,5-di-tert-butylcatecholate],

[1,4-dimethyl-2,3-bis-(2,6-dimethylphenylimino)-piperazine]nickel(II) [3,5-di-tert-butylcatecholate],

[2,3-bis-(2,6-dimethylphenylimino)-bicyclo[2.2.1]-heptane]nickel(II) [3,5-di-tert-butylcatecholate],

[1,4-dimethyl-2,3-bis-(2,6-dimethylphenylimino)-[1,4]diazepane]nickel(II) [3,5-di-tert-butylcatecholate],

[1-methyl-2,3-bis-(2,6-dimethylphenylimino)-cyclopentane]nickel(II) [3,5-di-tert-butylcatecholate],

[5-methyl-2,3-bis-(2,6-dimethylphenylimino)-tetrahydrofuran]nickel(II) [3,5-di-tert-butylcatecholate],

[5-methyl-2,3-bis-(2,6-dimethylphenylimino)-2,3-dihydrohydrofuran]nickel(II) [3,5-di-tert-butylcatecholate],

[1,2-bis-(2,6-di-iso-propylphenylimino)-cyclohexane]nickel(II) [3,5-di-tert-butylcatecholate],

[2,3-bis-(2,6-di-iso-propylphenylimino)-[1,4]dithiane]nickel(II) [3,5-di-tert-butylcatecholate],

[2,3-bis-(2,6-di-iso-propylphenylimino)-piperazine]nickel(II) [3,5-di-tert-butylcatecholate],

[1,4-dimethyl-2,3-bis-(2,6-di-iso-propylphenylimino)-piperazine]nickel(II) [3,5-di-tert-butylcatecholate],

[2,3-bis-(2,6-di-iso-propylphenylimino)-bicyclo[2.2.1]-heptane]nickel(II) [3,5-di-tert-butylcatecholate]

[1,4-dimethyl-2,3-bis-(2,6-di-iso-propylphenylimino)-[1,4]diazepane]nickel(II) [3,5-di-tert-butylcatecholate],

[1-methyl-2,3-bis-(2,6-di-iso-propylphenylimino)-cyclopentane]nickel(II) [3,5-di-tert-butylcatecholate],

[5-methyl-2,3-bis-(2,6-di-iso-propylphenylimino)-tetrahydrofuran]nickel(II) [3,5-di-tert-butylcatecholate],

[5-methyl-2,3-bis-(2,6-di-iso-propylphenylimino)-2,3-dihydrohydrofuran]nickel(I) [3,5-di-tert-butylcatecholate],

[1-(2,6-di-iso-propylphenylimino)-2-(2,6-dimethylphenylimino)-cyclohexane]nickel(II) [3,5-di-tert-butylcatecholate],

[2-(2,6-di-iso-propylphenylimino)-3-(2,6-dimethylphenylimino)-[1,4]dithiane]nickel(II) [3,5-di-tert-butylcatecholate],

[2-(2,6-di-iso-propylphenylimino)-3-(2,6-dimethylphenylimino)-piperazine]nickel(II) [3,5-di-tert-butylcatecholate],

[1,4-dimethyl-2-(2,6-di-iso-propylphenylimino)-3-(2,6-dimethylphenylimino)-piperazine]nickel(II) [3,5-di-tert-butylcatecholate],

[2-(2,6-di-iso-propylphenylimino)-3-(2,6-dimethylphenylimino)-bicyclo[2.2.1]-heptane]nickel(II) [3,5-di-tert-butylcatecholate],

[1,4-dimethyl-2-(2,6-di-iso-propylphenylimino)-3-(2,6-dimethylphenylimino)-[1,4]diazepane]nickel(II) [3,5-di-tert-butylcatecholate],

[1-methyl-2-(2,6-di-iso-propylphenylimino)-3-(2,6-dimethylphenylimino)-cyclopentane]nickel(II) [3,5-di-tert-butylcatecholate],

[5-methyl-2-(2,6-di-iso-propylphenylimino)-3-(2,6-dimethylphenylimino)-tetrahydrofuran]nickel(II) [3,5-di-tert-butylcatecholate],

[5-methyl-2-(2,6-di-iso-propylphenylimino)-3-(2,6-dimethylphenylimino)-2,3-dihydrohydrofuran]nickel(II) [3,5-di-tert-butylcatecholate],

[1-(2,6-di-iso-propylphenylimino)-2-(2,5-di-tert-butylphenylimino)-cyclohexane]nickel(II) [3,5-di-tert-butylcatecholate],

[2-(2,6-di-iso-propylphenylimino)-3-(2,5-di-tert-butylphenylimino)-[1,4]dithiane]nickel(II) [3,5-di-tert-butylcatecholate],

[2-(2,6-di-iso-propylphenylimino)-3-(2,5-di-tert-butylphenylimino)-piperazine]nickel(II) [3,5-di-tert-butylcatecholate],

[1,4-dimethyl-2-(2,6-di-iso-propylphenylimino)-3-(2,5-di-tert-butylphenylimino)-piperazine]nickel(II) [3,5-di-tert-butylcatecholate],

[2-(2,6-di-iso-propylphenylimino)-3-(2,5-di-tert-butylphenylimino)-bicyclo[2.2.1]-heptane]nickel(II) [3,5-di-tert-butylcatecholate],

[1,4-dimethyl-2-(2,6-di-iso-propylphenylimino)-3-(2,5-di-tert-butylphenylimino)-[1,4]diazepane]nickel(II) [3,5-di-tert-butylcatecholate],

[1-methyl-2-(2,6-di-iso-propylphenylimino)-3-(2,5-di-tert-butylphenylimino)-cyclopentane]nickel(II) [3,5-di-tert-butylcatecholate],

[5-methyl-2-(2,6-di-iso-propylphenylimino)-3-(2,5-di-tert-butylphenylimino)-tetrahydrofuran]nickel(II) [3,5-di-tert-butylcatecholate],

[5-methyl-2-(2,6-di-iso-propylphenylimino)-3-(2,5-di-tert-butylphenylimino)-2,3-dihydrohydrofuran]nickel(II) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [3,5-di-tert-butylcatecholate),

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-methylbenzenamine]cobalt(I) [3,5-di-tert-butyl catecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine]cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-6-methylbenzenamine]cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-benzenamine]cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-methylbenzenamine]cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine]cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propyl-6-methylbenzenamine) cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propylbenzenamine]cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[benzenamine) cobalt(I) [3,5-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [3,6-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl catecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [3,6-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-6-methylbenzenamine]cobalt(I) [3,6-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-benzenamine]cobalt(I) [3,6-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [3,6-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-methylbenzenamine]cobalt(I) [3,6-di-tert-butylcatecholate),

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [3,6-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butylcatecholate),

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propyl-6-methylbenzenamine) cobalt(I) [3,6-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propylbenzenamine]cobalt(I) [3,6-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[benzenamine]cobalt(I) [3,6-di-tert-butylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-6-methylbenzenamine) cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-benzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate], ‘

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2, 6-pyridinediyldimethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propyl-6-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[benzenamine]cobalt(I) [3,6-di-tert-butyl-4-chlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-6-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-benzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,6-dimethylbenzenamine) cobalt(I) [3,6-di-tert-butyl4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propyl-6-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[benzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dichlorocatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propylbenzenamine) cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-6-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-benzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2, 6-pyridinediyldimethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine-cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propyl-6-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[benzenamine]cobalt(I) [3,6-di-tert-butyl-4-methoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate),

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-6-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate),

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-benzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,4,6-trimethylbenzenamine) cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate),

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propyl-6-methylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

N,N′

-(2,6-pyridinediyldimethylidyne)bis[2-iso-propylbenzenamine]cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[benzenamine) cobalt(I) [3,6-di-tert-butyl-4,5-dimethoxycatecholate),

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [4-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-methylbenzenamine]cobalt(I) [4-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [4-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [4-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [4-iso-propylcatecholate],

N,N′

-(2, 6-pyridinediyldiethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine]cobalt(I) [4-iso-propylcatecholate),

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [4-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-6-methylbenzenamine]cobalt(I) [⁴-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-benzenamine]cobalt(I) [4-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [4,5-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-methylbenzenamine]cobalt(I) [4,5-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [4,5-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4-dimethylbenzenamine) cobalt(I) [4,5-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [4,5-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine]cobalt(I) [4,5-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [4,5-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-6-methylbenzenamine]cobalt(I) [4,5-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-benzenamine]cobalt(I) [4,5-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4,6-trimethylbenzenarnine]cobalt(I) [4-cyclohexylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-methylbenzenamine]cobalt(I) [4-cyclohexylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [4-cyclohexylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [4-cyclohexylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [4-cyclohexylcatecholate],

N,N′

-(2, 6-pyridinediyldiethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine]cobalt(I) [4-cyclohexylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [4-cyclohexylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-6-methylbenzenamine]cobalt(I) [4-cyclohexylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-benzenamine]cobalt(I) [4-cyclohexylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [3,4,6-tri-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-methylbenzenamine]cobalt(I) [3,4,6-tri-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [3,4,6-tri-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [3,4,6-tri-iso-propylcatecholate),

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [3,4,6-tri-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine]cobalt(I) [3,4,6-tri-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [3,4,6-tri-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-6-methylbenzenamine]cobalt(I) [3,4,6-tri-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-benzenamine]cobalt(I) [3,4,6-tri-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [3,6-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-methylbenzenamine]cobalt(I) [3,6-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [3,6-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [3,6-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [3,6-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [3,6-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-6-methylbenzenamine]cobalt(I) [3,6-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-benzenamine]cobalt(I) [3,6-di-iso-propylcatecholate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [naphthalene-2,3-diolate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-methylbenzenamine]cobalt(I) [naphthalene-2,3-diolate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [naphthalene-2,3-diolate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [naphthalene-2,3-diolate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [naphthalene-2,3-diolate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis(2,6-di-iso-propyl-4-methylbenzenamine]cobalt(I) [naphthalene-2,3-diolate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-4-methylbenzenamine) cobalt(I) [naphthalene-2,3-diolate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-6-methylbenzenamine]cobalt(I) [naphthalene-2,3-diolate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-benzenamine]cobalt(I) [naphthalene-2,3-diolate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4,6-trimethylbenzenamine]cobalt(I) [phenanthrene-9,10-diolate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-methylbenzenamine]cobalt(I) [phenanthrene-9,10-diolate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-dimethylbenzenamine]cobalt(I) [phenanthrene-9,10-diolate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,4-dimethylbenzenamine]cobalt(I) [phenanthrene-9,10-diolate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2,6-di-iso-propylbenzenamine]cobalt(I) [phenanthrene-9,10-diolate],

N,N′

-(2, 6-pyridinediyldiethylidyne)bis[2,6-di-iso-propyl-4-methylbenzenamine cobalt(I) [phenanthrene-9,10-diolate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-4-methylbenzenamine]cobalt(I) [phenanthrene-9,10-diolate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-6-methylbenzenamine]cobalt(I) [phenanthrene-9,10-diolate],

N,N′

-(2,6-pyridinediyldiethylidyne)bis[2-iso-propyl-benzenamine]cobalt(I) [phenanthrene-9,10-diolate],

or any of the above compounds where “

cobalt(I)”

is replaced with platinum(II), palladium(II), nickel(II), iron(II), copper(I), or cobalt(II) and where “

nickel(II)”

is replaced with platinum(II), palladium(II), cobalt(I), iron(II), copper(I), or cobalt(II).

16. The compound of any of claims 1 to 13 where X is represented by the formulae:

17. The compound of claim 16, where R* is tert-butyl or iso-propyl, R** is methyl, and X* is F, Cl, Br or OR**.

18. The compound of any of claims 1 to 13 where each X is independently selected from the group consisting of ZETA-CATACHOLATES.

19. The composition of any of claims 1 to 13 where each X is independently selected from the group consisting of THETA-CATACHOLATES.

20. A catalyst system comprising an activator and the compound of any of the above claims.

21. The catalyst system of claim 20 wherein the activator comprises an alumoxane and or a modified alumoxane.

22. The catalyst system of claim 20 wherein the activator comprises methyl alumoxane and or modified methyl alumoxane.

23. The catalyst system of claim 20 wherein the activator comprises [Me₂PhNH][B(C₆F₅)₄], [Ph₃C][B(C₆F₅)₄], [Me₂PhNH][B((C₆H₃-3,5-(CF₃)₂))₄], [Ph₃C][B((C₆H₃-3,5-(CF₃)₂))₄], [Bu₃NH][BF₄], [NH₄][PF₆], [NH₄][SbF₆], [NH₄][AsF₆], [NH₄][B(C₆H₅)₄], B(C₆F₅)₃ and/or B(C₆H₅)₃.

24. The catalyst system of claim 20 wherein the activator is an ionic stoichiometric activator compound.

25. The catalyst system of claim 20 wherein the activator is a neutral stoichiometric activator compound.

26. The catalyst system of claim 20 wherein the activator is a non-coordinating anion.

27. The catalyst system of claim 20 wherein the activator is selected from the group consisting of:

trimethylammonium tetraphenylborate, triethylammonium tetraphenylborate, tripropylammonium tetraphenylborate, tri(n-butyl)ammonium tetraphenylborate, tri(tert-butyl)ammonium tetraphenylborate, N,N-dimethylanilinium tetraphenylborate, N,N-diethylanilinium tetraphenylborate, N,N-dimethyl-(2,4,6-trimethylanilinium) tetraphenylborate, trimethylammonium tetrakis(pentafluorophenyl)borate, triethylammonium tetrakis(pentafluorophenyl)borate, tripropylammonium tetrakis(pentafluorophenyl)borate, tri(n-butyl)ammonium tetrakis(pentafluorophenyl)borate, tri(sec-butyl)ammonium tetrakis(pentafluorophenyl)borate, N,N-dimethylanilinium tetrakis(pentafluorophenyl)borate, N,N-diethylanilinium tetrakis(pentafluorophenyl)borate, N,N-dimethyl-(2,4,6-trimethylanilinium) tetrakis(pentafluorophenyl)borate, trimethylammonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, triethylammonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, tripropylammonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, tri(n-butyl)ammonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, dimethyl(tert-butyl)ammonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, N,N-dimethylanilinium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, N,N-diethylanilinium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis-(2,3,4,6-tetrafluorophenyl)borate, trimethylammonium tetrakis(perfluoronaphthyl)borate, triethylammonium tetrakis(perfluoronaphthyl)borate, tripropylammonium tetrakis(perfluoronaphthyl)borate, tri(n-butyl)ammonium tetrakis(perfluoronaphthyl)borate, tri(tert-butyl)ammonium tetrakis(perfluoronaphthyl)borate, N,N-dimethylanilinium tetrakis(perfluoronaphthyl)borate, N,N-diethylanilinium tetrakis(perfluoronaphthyl)borate, N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(perfluoronaphthyl)borate, trimethylammonium tetrakis(perfluorobiphenyl)borate, triethylammonium tetrakis(perfluorobiphenyl)borate, tripropylammonium tetrakis(perfluorobiphenyl)borate, tri(n-butyl)ammonium tetrakis(perfluorobiphenyl)borate, tri(tert-butyl)ammonium tetrakis(perfluorobiphenyl)borate, N,N-dimethylanilinium tetrakis(perfluorobiphenyl)borate, N,N-diethylanilinium tetrakis(perfluorobiphenyl)borate, N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(perfluorobiphenyl)borate, trimethylammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, triethylammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, tripropylammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, tri(n-butyl)ammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, tri(tert-butyl)ammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, N,N-dimethylanilinium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, N,N-diethylanilinium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, di-(iso-propyl)ammonium tetrakis(pentafluorophenyl)borate, and dicyclohexylammonium tetrakis(pentafluorophenyl)borate, tri(o-tolyl)phosphonium tetrakis(pentafluorophenyl)borate, tri(2,6-dimethylphenyl)phosphonium tetrakis(pentafluorophenyl)borate, tropillium tetraphenylborate, triphenylcarbenium tetraphenylborate, triphenylphosphonium tetraphenylborate, triethylsilylium tetraphenylborate, benzene(diazonium)tetraphenylborate, tropillium tetrakis(pentafluorophenyl)borate, triphenylcarbenium tetrakis(pentafluorophenyl)borate, triphenylphosphonium tetrakis(pentafluorophenyl)borate, triethylsilylium tetrakis(pentafluorophenyl)borate, benzene(diazonium) tetrakis(pentafluorophenyl)borate, tropillium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, triphenylcarbenium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, triphenylphosphonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, triethylsilylium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, benzene(diazonium) tetrakis-(2,3,4,6-tetrafluorophenyl)borate, tropillium tetrakis(perfluoronaphthyl)borate, triphenylcarbenium tetrakis(perfluoronaphthyl)borate, triphenylphosphonium tetrakis(perfluoronaphthyl)borate, triethylsilylium tetrakis(perfluoronaphthyl)borate, benzene(diazonium)tetrakis(perfluoronaphthyl)borate, tropillium tetrakis(perfluorobiphenyl)borate, triphenylcarbenium tetrakis(perfluorobiphenyl)borate, triphenylphosphonium tetrakis(perfluorobiphenyl)borate, triethylsilylium tetrakis(perfluorobiphenyl)borate, benzene(diazonium)tetrakis(perfluorobiphenyl)borate, tropillium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, triphenylcarbenium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, triphenylphosphonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, triethylsilylium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, and benzene(diazonium) tetrakis(3,5-bis(trifluoromethyl)phenyl)borate.

28. The catalyst system of any of claim 20 to 27 further comprising a co-activator.

29. A composition comprising a compound of any of claims 1 to 19 and a support.

30. A composition comprising a catalyst system of any of claims 20 to 28 and a support.

31. The composition of claim 29 or 30 where the support comprises one or more Group-2,-3,-4,-5,-13, or -14 metal or metalloid oxides.

32. The composition of claim 29 or 30 where the support comprises silica, alumina, silica-alumina, or mixtures thereof.

33. The composition of claim 29 or 30 where the support is silica.

34. A method to polymerize an unsaturated monomer comprising contacting the monomer with the catalyst system of any of claims 20 to 28.

35. A method to polymerize an unsaturated monomer comprising contacting the monomer with the composition of any of claims 30 to 34.

36. A method to oligomerize an unsaturated monomer comprising contacting the monomer with the catalyst system of any of claims 20 to 28.

37. A method to oligomerize an unsaturated monomer comprising contacting the monomer with the composition of any of claims 30 to 34.

38. The method of any of claims 34 to 37 where the monomer comprises one or more C₂ to C₁₀₀ olefins.

39. The method of any of claims 34 to 37 where the monomer comprises one or more of ethylene, propylene, butene, pentene, hexene, heptene, octene, nonene, decene, dodecene, 4-methylpentene-1,3-methylpentene-1,3,5,5-trimethylhexene-1, and 5-ethylnonene-1.

40. The method of any of claims 34 to 38 where the monomer comprises ethylene.

41. The method of any of claims 34 to 38 where the monomer comprises propylene.

42. The transition metal compound of any of claims 1 and 5-19 wherein M is nickel, the compound is dimagnetic and the coordination sphere of the compound is arranged in a square planar geometry.

43. The compound of claim 1, 2, 3, or 4 wherein is L is selected from the group consisting of IOTA-LIGANDS.

44. A catalyst system comprising the compound of claim 42 or 43, an activator and an optional support.

45. A method to oligomerize or polymerize an unsaturated monomer comprising contacting the monomer with the catalyst system of claim 44.

46. The method of any of claims 34, 35, 36, 37, 38, 39, 40, 41 or 45 wherein the monomer comprises one or more norbornenes, substituted norbornenes, cyclopentadienyls or substituted cyclopentene.