Protic N-heterocyclic carbenes (pNHCs) are non-innocent analogs of the ubiquitous Arduengo type carbenes. The N-H wingtip moiety confers metal-ligand bifunctionality to complexes bearing these ligands, while retaining the strong σ-donor properties of conventional NHCs. We herein report the synthesis of IrIII complexes possessing chelating NHC/imidazolyl ligands upon electrophilic C-H activation. These complexes were tested as pre-catalyst for the direct hydrogenation of polar bonds.

Synthesis and reactivity of IrIII complexes bearing NHC/imidazolyl chelate ligands

253rd National Meeting (2017)

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