Use of homogeneous catalytic systems which include as a pre-catalyst a complex of a Group IV metal and a salalen ligand in the polymerization of alpha-olefins, is disclosed. The alpha-olefin polymers obtained are characterized by controlled levels of tacticity. Also disclosed are novel salalen ligands and novel complexes thereof with Group IV metals.
揭示了在α-烯烃聚合中使用包括一种Group IV
金属和一种salalen
配体的前催化剂的均相催化系统。所获得的α-烯烃聚合物具有可控的立构性
水平。还揭示了新型的salalen
配体及其与Group IV
金属的新型配合物。