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Updated: Aug 30, 2025

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
A Versatile Palladium Synthon: [Pd(NHC)(PhC≡CPh)]
Francis Bru1, Mathieu Lesieur2, Albert Poater3
1Department of Chemistry, Center for Sustainable Chemistry, Ghent University, Krijgslaan 281, 9000, Ghent, Belgium.
Abstract:
The synthesis and isolation of [Pd(NHC)(PhC≡CPh)] complexes are reported. These new 14-electron Pd(0)-complexes are key synthons leading to known palladium(0) and palladium(II) species, as well as permitting access to unprecedented mixed NHC-phosphite palladium(0) complexes. This motif permits the facile catalytic hydrosilylation of allenes. DFT calculations have allowed the characterization of the relatively weak interaction between the metal and the diphenylacetylene ligand, with a comparison with a series of ligands with more or less coordinating power, bearing varied structural and electronic properties.
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