Heteromultimetallic Complexes with Redox‐Active Mesoionic Carbenes: Control of Donor Properties and Redox‐Induced Catalysis

摘要: Mesoionic carbenes (MICs) are currently hugely popular as ligands, and triazolylidenes arguably the most prominent classes of such MICs. with ferrocenyl substituents presented that can act metalloligands for generation heteromultimetallic iridium(I) gold(I) complexes. The allow reversible oxidation these complexes, steps have a strong influence on donor properties Tolman electronic parameters (TEP) determined from analysis iridium-carbonyl complexes show neutral ferrocenyl-MIC ligands stronger donors than imidazolylidene based carbenes, one-electron oxidized MICs in range tricyclohexyl phosphines two-electron forms, which electron-poor, lie triphenyl phosphines. Taking advantage electron-poor MICs, we their potent catalysts synthesis oxazolines, MIC without any additional additive, outperforming counterparts by almost factor ten. These results thus present first examples reversibly electronically tunable, potential types catalysis where necessary. molecular electroactive materials is also shown.