N.m.r. evidence for a fluxional allyl-hydride species featuring an aliphatic C–H … IrIIIinteraction

Abstract

The [Ir(H)(PPh₃)₂(η³-2,3-Dimethylbutenyl)]⁺ ion has been identified in CD₂Cl₂ solution from its ¹H,²H and ³¹P n.m.r. spectra, which reveal a novel C–H … Ir^III interaction and a fluxional process involving facile hydrogen transfer between metal and hydrocarbon.