Oxidative addition of 2-substituted azolium salts to Group-10 metal zero complexes--a DFT study.

Oxidative addition of 2-substituted azolium salts to Group-10 metal zero complexes--a DFT study. Research Abstract Details 

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Oxidative addition of 2-substituted azolium salts to Group-10 metal zero complexes--a DFT study. Abstract Text:

David C Graham,Kingsley J Cavell,Brian F Yates,David C Graham,Kingsley J Cavell,Brian F Yates,

Generation of N-heterocyclic carbene (NHC) complexes [(dmpe)M(azol-2-ylidene)R] via the oxidative addition of a series of 2-substituted azolium salts to Group-10 zerovalent metal complexes has been investigated using density functional theory (2-R = H, Me, Ph; Azole = imidazole, thiazole, oxazole; M = Ni, Pd, Pt). Overall, platinum-based pathways result in the greatest enthalpies of reaction, but due to the reactive nature of Group-10 metals bearing the 1,2-bis(dimethylphosphino)ethane (dmpe) chelate, nickel and palladium species also have little trouble proceeding to stable products in the absence of a significant barrier. Imidazolium salts were found to be the most vulnerable to oxidative addition due to their low stabilisation energies when compared to the oxazolium and thiazolium species. Activation barriers show the general trend of phenyl > methyl > hydrido with regard to the azole 2-substituent, with no observed barrier for all but one of the 2-hydrido cases. Minimal barriers were found to exist in a number of cases for activation of a C(2)-CH3 bond suggesting that synthesis of alkyl-carbene complexes may be possible via this route under certain conditions, and therefore ionic liquids based on these substituted azolium salts may be active participants in catalytic reactions.

Oxidative addition of 2-substituted azolium salts to Group-10 metal zero complexes--a DFT study. Publishing Authors By Initials

DC Graham,KJ Cavell,BF Yates,DC Graham,KJ Cavell,BF Yates,

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Oxidative addition of 2-substituted azolium salts to Group-10 metal zero complexes--a DFT study. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Dalton transactions (Cambridge, England : 2003)

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Page Numbers: 4650-8

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ISSN: 1477-9226

DAY: 8

MONTH: 08

YEAR: 2007

Oxidative addition of 2-substituted azolium salts to Group-10 metal zero complexes--a DFT study. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Oxidative addition of 2-substituted azolium salts to Group-10 metal zero complexes--a DFT study.

AFFILIATION: School of Chemistry, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia.

Country: England

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MEDLINETA: Dalton Trans

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