COMPLEXES OF PLATINUM (0): I. COMPLEXES WITH TRIPHENYLPHOSPHINE AND SUBSTITUTED PHENYLACETYLENES

Abstract

Kinetic and equilibrium measurements have been made on the exchange of one arylacetylene for another of different structure in the compounds bis-triphenylphosphineacetylene-platinum (0). The rate of exchange is proportional to the concentration of the complex but is independent of the reagent. The complexes are stabilized by electron-withdrawing groups in the acetylene ligand. A mechanism for the reactions is proposed in which an intermediate Pt(Ph₃)₂ is formed which has a significant stability.