Ru-aryloxide metathesis catalysts with enhanced lability: Assessing the efficiency and homogeneity of initiation via ring-opening metathesis polymerization studies

被引：23

作者：

Conrad, JC ^{[1
]}

Camm, KD ^{[1
]}

Fogg, DE ^{[1
]}

机构：

[1] Univ Ottawa, Dept Chem, Ctr Catalysis Res & Innovat, Ottawa, ON K1N 6N5, Canada

来源：

INORGANICA CHIMICA ACTA | 2006年 / 359卷 / 06期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

ruthenium; aryloxides; metathesis; ring-opening metathesis polymerization; initiation; efficiency;

D O I：

10.1016/j.ica.2005.09.068

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

New Ru-aryloxide catalysts for olefin metathesis are obtained in high yields by treating RuCl2(IMes)(3-bromopyridine)(=CHPh) with TlOC6X5 (X = F, Br). The lability of the 3-bromopyridine ligand increases reactivity, relative to the corresponding pyridine complexes, in ROMP of cyclooctene and norbornene monomers. Initiation efficiency and rates of initiation and propagation were determined: in all cases, propagation is faster than initiation. Initiatiors 5a/b enable a level of control over molecular weight and polydispersity intermediate between that possible with the second-generation catalyst 2, and its pyridine derivative 3a/b. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：1967 / 1973

页数：7

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