The Potential of π-Bonded Organometallic Polymers in Catalyst Design

Abstract

Abstract Reductive substitution, the process whereby a hydrocarbon ligand, usually a cyclopentadienyl group, in a transition metal complex is replaced by another unsaturated hydrocarbon with concomitant metal reduction has been utilized to prepare novel complexes of Cr°, CrI, MnI, CoI and Ni°. Similarly, ligand substitution, defined more generally as replacement of ligand(s) of a metal complex by an unsaturated hydrocarbon but with no change in the oxidation state of the metal, has resulted in the synthesis of a series of tetraphenylborate and substituted tetraphenylborate complexes of FeII, MoI, CrI, WI, and CoI. These procedures and the complexes derived therefrom are considered models for polymers incorporating a variety of novel features.