Formation of Ethylene-Bridged Dinuclear IrIII Species via M−C Coupling of IrII and IrII(ethene)

Ethene dissociation from [(Mentpa)IrII(ethene)]2+, induced by coordination of acetonitrile, causes a rapid and selective M−C coupling between IrII and IrII(ethene), resulting in ethylene-bridged dinuclear iridium(III) complexes of the composition [{(Mentpa)IrIII(NCMe)}22-C2H4)]4+ (n = 2, 3).