Structure and Reactivity of 'Unusual' N-Heterocyclic Carbene (NHC) Palladium Complexes Synthesized from Imidazolium Salts

摘要

Recently, a number of new transition metal-catalyzed processes have been developed and optimized through high-throughput and combinatorial methods. Such strategies are particularly efficient for the screening of a large number of transition metal-ligand combinations under various sets of reaction conditions. However, under these in situ conditions, the exact nature of the catalytic species is not always precisely known. Indeed, the assumption of a normal mode of binding between ligand and transition metal is most often assumed and may be misleading.