Bimetallic complexes for polymerization catalysis

Abstract

Bimetallic polymn. catalysts based on a rigid terphenyl linker appended with various donors for metal binding have been previously prepd. Access to both meta and para terphenyl linkages allow for variation in metal-metal distance and steric profiles. The chem. of bimetallic complexes supported by phenoxy-imine and bisphenoxy amine ligands has been explored with early and late transition metals. Depending on the nature of the metal and the ligands, these bimetallic catalysts have shown tolerance of amines, polymn. of amino olefins and tacticity control. The mechanism of polymn. of a variety of monomers with these bimetallic catalysts will be discussed.