Donor complexes of bis(1-indenyl)phenylborane dichlorozirconium as isospecific catalysts in propene polymerization

Abstract

Chiral boron-bridged ansa-type zirconocenes can be prepared in a few simple steps; various donor molecules such as Et₂O, THF or PMe₃ undergo complexation at boron leading to catalysts having vastly different catalytic properties in Ziegler–Natta polymerization of propene; the PMe₃-containing catalyst is the most active and stereoselective (96% isotacticity).