Transition metal bis(phenolate) complexes and their use as catalysts for olefin polymerization
申请人:ExxonMobil Chemical Patents Inc.
公开号:US11254763B2
公开(公告)日:2022-02-22
This invention relates to transition metal complexes of a dianionic, tridentate ligand that features a central neutral heterocyclic Lewis base and two phenolate donors, where the tridentate ligand coordinates to the metal center to form two eight-membered rings. Preferably the bis(phenolate) complexes are represented by Formula (I):
where M, L, X, m, n, E, E′, Q, R1, R2, R3, R4, R1′, R2′, R3′, R4′, A1, A1′,
are as defined herein, where A1QA1′ are part of a heterocyclic Lewis base containing 4 to 40 non-hydrogen atoms that links A2 to A2′ via a 3-atom bridge with Q being the central atom of the 3-atom bridge.
本发明涉及二阴离子三叉配体的过渡金属配合物,该配体具有一个中心中性杂环路易斯碱和两个苯酚供体,其中三叉配体与金属中心配位形成两个八元环。双(苯酚)配合物最好用式 (I) 表示:
式中 M、L、X、m、n、E、E′、Q、R1、R2、R3、R4、R1′、R2′、R3′、R4′、A1、A1′、
如本文所定义,其中 A1QA1′ 是含有 4 至 40 个非氢原子的杂环路易斯碱的一部分,该路易斯碱通过 3 原子桥将 A2 与 A2′ 连接起来,Q 是 3 原子桥的中心原子。