THE ROLE OF 2-COMPONENT CATALYSTS CONTAINING CHELATING BISARYLOXIDE LIGANDS IN CONTROLLING THE STEREOCHEMISTRY OF THE METATHESIS POLYMERIZATION OF NORBORNENE

被引：21

作者：

BARNES, DL ^{[1
]}

EILERTS, NW ^{[1
]}

HEPPERT, JA ^{[1
]}

HUANG, WH ^{[1
]}

MORTON, MD ^{[1
]}

机构：

[1] UNIV KANSAS,DEPT CHEM,LAWRENCE,KS 66045

来源：

POLYHEDRON | 1994年 / 13卷 / 08期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0277-5387(00)80260-0

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The ring-opening metathesis polymerization of norbornene and 5,5-dimethylnorbornene has been studied with a range of tungsten(VI) ring-opening metathesis polymerization procatalysts containing chelating diolate ligands, including catechols, 1,8-dihydroxynaphthalene, 1,1'-bi-2-naphthol, biphenanthrol and bis(2-hydroxyphenyl) methane. One class of these catalysts, W(=X)(OArO)Cl2(THF) (X = O or NArMe2) was produced via alcoholysis reactions between W(=X)Cl4 and the respective diol. Polymers of norbornene produced with these catalysts showed a reasonable correlation between ring size and cis-selectivity. This effect is most likely steric in origin. Analyses of the tacticity of poly-5,5-dimethylnorbornene showed a correlation between high cis-olefin content and syndiotacticity, even when produced with catalysts containing asymmetric chelating diolate ligands.

引用

页码：1267 / 1275

页数：9

共 38 条

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