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DOI Prefix 10.20431 |
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International Journal of Advanced Research in Chemical Science
Volume-2 Issue-3, 2015, Page No:14-20
Synthesis of Palladium N-Heterocyclic Carbene Complexes and the Assessment and Implications of the Use of these Complexes as Catalysts for Alkoxycarbonylation Reactions
Maria M. Marco1,Nicholas E.Leadbeater1*
1.Formerly of Department of Chemistry, King’s College London, Strand, London WC2R 2LS UK
2.Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, USA
2.Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, USA
Citation : Maria M. Marco,Nicholas E.Leadbeater, Synthesis of Palladium N-Heterocyclic Carbene Complexes and the Assessment and Implications of the Use of these Complexes as Catalysts for Alkoxycarbonylation Reactions International Journal of Advanced Research in Chemical Science. 2015;2(3):14-20.
Abstract
A number of palladium N-heterocyclic carbene (NHC) complexes are prepared and their synthesis discussed in terms of the product isomers formed and the implications on catalytic activity. The use of the Pd-NHC complexes in alkoxycarbonylation reactions is probed. There has been some debate about the use of Pd-NHC complexes in reactions involving carbon monoxide, some reports showing that NHC ligands are non-innocent in the presence of CO, and some claiming that complexes bearing these ligands are catalytically active. Our results suggest that Pd-NHC complexes are poisoned by carbon monoxide, forming metallic palladium and organic byproducts. This adds further credence to the assertion that Pd-NHC complexes have limited use as catalysts for reactions involving carbon monoxide as a reagent.
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