多氮螯合配位后过渡金属络合物烯烃聚合催化剂

A2二亚胺镍、钯络合物和吡啶二亚胺铁、钴络合物是近几年来发现的新一代烯烃均相聚合后过渡金属催化剂。这类催化剂具有活性高、选择性易调变、聚合物性质可控制的特点, 尤其是对官能团中的杂原子的稳定性方面优于前过渡金属催化剂。本文将近年来的有关报道归纳为4 个方面进行评述: 络合物的合成和结构; 配体结构因素对络合物催化性能的影响; 催化烯烃高聚、齐聚和共聚以及催化反应机理。

Catalysis of Multi-Nitrogen Chelated Late-Transition-Metal Complexes for Olefin Polymerization

A2D iim ine nickel, palladium complexes and pyridine bisimine iron, cobalt complexes are discovered in recent years to be new generation late transition metal catalysts for olefin homogeneous poly merization and oligomerization. They have the advantages in catalytic activity, adjustable selectivity, controlla ility of product properties and the stability towards functional groups. The relevant reports are introduced in four parts: the syntheses and structures of the novel catalysts; the effect of ligand structures on the catalytic behavior of complexes; catalysis of the complexes for ethylene and Aolef in polymerization,oligomerization and copoly merization; the mechanism of the catalytic reactions.