Phosphine phosphonate and phenoxyphosphine ligands bearing polyethylene glycol (PEG) chains are used as described herein to produce heterobimetallic catalysts. The ligands can be metallated selectively with palladium or nickel and secondary metal ions to provide well-defined heterobimetallic compounds. These heterobimetallic complexes exhibit accelerated reaction rates and greater thermal stability in olefin polymerization compared to other catalysts.
如本文所述,含有聚
乙二醇(P
EG)链的
膦酸膦和苯氧基
膦配体可用于生产杂多
金属催化剂。
配体可选择性地与
钯或
镍以及仲
金属离子发生
金属化反应,从而生成定义明确的杂多
金属化合物。与其他催化剂相比,这些杂多
金属复合物在烯烃聚合反应中表现出更快的反应速率和更高的热稳定性。