Transfer of a pentamethylcyclopentadienyl ligand from phosphorus to nickel: generation and spectroscopic characterization of the first examples of metalloiminophosphanes [(η5-Me5C5)(R3P)Ni–PNBut](R = Et, Bu, or Ph)

Abstract

Reaction of (Me₅C₅)PNBu^t with [(R₃P)₂Ni(cod)](cod = cyclo-octa-1,5-diene)(R = Et, Bu, or Ph) produces complexes [(R₃P)₂Ni(C₅Me₅)PNBu^t], which rearrange to yield the novel metal-substituted iminophosphanes, [(R₃P)(η⁵-C₅Me₅)Ni–PNBu^t] and free phosphane R₃P, the new complexes being identified by means of n.m.r. spectroscopy; similarly, the metallophospha-alkenes, [(R₃P)(η⁵-C₅Me₅)Ni–PC(SiMe₃)₂] are formed via reaction of (Me₅C₅)PC(SiMe₃)₂ and [(R₃P)Ni(alkene)₂].