Zirconium and hafnium complexes bearing pyrrolidine derived salalen-type {ONNO} ligands and their application for ring-opening polymerization of lactides

Abstract

Zirconium and hafnium complexes [((<italic>S</italic>)-L)M(OⁱPr)₂] bearing salalen-type {ONNO} ligands have been synthesized and applied as efficient isoselective catalysts for ring-opening polymerization of <italic>rac</italic>-lactide.