New mononuclear and polynuclear perfluoroarylmetalate cocatalysts for stereospecific olefin polymerization

被引：60

作者：

Chen, MC ^{[1
]}

Roberts, JAS ^{[1
]}

Marks, TJ ^{[1
]}

机构：

[1] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

来源：

ORGANOMETALLICS | 2004年 / 23卷 / 05期

关键词：

D O I：

10.1021/om0341698

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Mononuclear and polynuclear perfluoroarylborate, -aluminate, and -gallate cocatalysts for metallocene-mediated olefin polymerization have been synthesized as trityl fluoride adducts of known perfluoroaryl-metalloid cocatalysts. Propylene polymerization experiments using these species as cocatalysts with the C-s-symmetric precatalyst [Me2C(Cp)(fluorenyl)]ZrMe2 reveal a marked counteranion dependence of polymerization activity, product polymer syndiotacticity, and relative [m] and [mm] stereoerror abundance, with the polynuclear perfluoroaryl cocatalysts uniformly giving enhanced product polymer stereoregularity us the neutral analogues.

引用

页码：932 / 935

页数：4

共 45 条

[1] Polynuclear catalysis: Enhancement of enchainment cooperativity between different single-site olefin polymerization catalysts by ion pairing with a binuclear cocatalyst [J].