1H nuclear magnetic resonance studies of exchange reactions between complexes R3M,M′R3′ and their components. Part II. Exchange between the complex trimethylphosphine–trimethylborane and an excess of trimethylborane and between trimethylphosphine–trimethylalane and an excess of hexamethyldialuminium

Abstract

The reaction between the complex Me₃P,BMe₃ and an excess of trimethylborane in toluene or dichloromethane is first order in complex concentration, consistent with a dissociative mechanism. Data for the complex Me₃P,AlMe₃ and an excess of hexamethyldialuminium in toluene suggest a bimolecular reaction between complex and monomeric trimethylalane. Explicit n.m.r. line-shape equations are given for exchange between a singlet and a first-order doublet.