Group 4 metal complexes comprising a polyvalent, heteroaryl donor ligand and their use as components of olefin polymerization catalysts, especially suited for preparing propylene copolymer products having high isotacticity and low molecular weight, are disclosed.
                            本发明揭示了一种包括多价杂环供体
配体的第四组
金属配合物,并将其用作烯烃聚合催化剂的组分,特别适用于制备高等晶形性和低分子量的
丙烯共聚物产品。