Preparation and reactions of alkyl carbonyl complexes of platinum(II)

Abstract

One-step reduction of PtCl₂ to platinum(0) cluster complexes [Pt₄(CO)₅L₄], followed by oxidative addition with Mel, provides a route to new platinum(II) complexes [Pt(CO)L(I)Me](where L is a phosphorus ligand). These react with uncharged ligands L′ to give carbonyl substitution or insertion products or a mixture of both. Both electronic and steric effects help to determine the type of product obtained and, in the case of the insertion reactions, the position of equilibrium between the complexes [Pt(CO)L(I)Me] and [PtLL′I(COMe)].