Iron and cobalt ethylene polymerization catalysts: Variations on the central donor

被引：175

作者：

Britovsek, GJP ^{[1
]}

Gibson, VC ^{[1
]}

Hoarau, OD ^{[1
]}

Spitzmesser, SK ^{[1
]}

White, AJP ^{[1
]}

Williams, DJ ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AY, England

来源：

INORGANIC CHEMISTRY | 2003年 / 42卷 / 11期

关键词：

D O I：

10.1021/ic034040q

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Three classes of ligands, designed to explore the effect of variations on the central pyridine donor core in bis(imino)pyridine iron and cobalt ethylene polymerization catalysts of the general formula [LMCl2] (M = Fe or Co), have been prepared. The first class comprises six-membered N-heterocycles (pyrimidine and triazine) and the second class five-membered heterocycles (furan and thiophene) as the central donor core. In the third class of ligands, the imine donor arm has been extended by one carbon to give anionic tridentate ligands based on carbazole and neutral analogues based on dibenzofuran and dibenzothiophene. The coordination behavior of these ligands upon reaction with FeCl2 or CoCl2 has been investigated, whereby only in the case of the neutral pyrimidine or the anionic carbazolide unit as the central donor core have stable complexes been obtained. Ethylene polymerization results are compared with the parent bis(imino)pyridine iron and cobalt catalyst systems.

引用

页码：3454 / 3465

页数：12

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