Homogeneous ethylene-polymerization catalysts based on alkyl cations of the rare-earth metals: Are dicationic mono(alkyl) complexes the active species?

被引：135

作者：

Arndt, S ^{[1
]}

Spaniol, TP ^{[1
]}

Okuda, J ^{[1
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Anorgan Chem & Analyt Chem, D-55099 Mainz, Germany

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2003年 / 42卷 / 41期

关键词：

alkyl ligands; aluminum; cations; polymerization; rare earth elements;

D O I：

10.1002/anie.200352532

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Easily accessible, the tris(alkyl) complexes of rare-earth elements [Ln(CH2SiMe3)3(thf)2] are activated by [NMe2HPh] [B(C6F5)4] in the presence of AliBu3 to catalyze homogeneous ethylene polymerization. Model reactions show that the bis(alkyl) yttrium monocation is converted into the mono(alkyl) dication (see picture), which appears to be the active species in ethylene polymerization.

引用

页码：5075 / 5079

页数：5

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