Cationic Organomagnesium Complexes as Highly Active Initiators for the Ring-Opening Polymerization of ε-Caprolactone

被引：75

作者：

Ireland, Benjamin J. ^{[1
]}

Wheaton, Craig A. ^{[1
]}

Hayes, Paul G. ^{[1
]}

机构：

[1] Univ Lethbridge, Dept Chem & Biochem, Lethbridge, AB T1K 3M4, Canada

来源：

ORGANOMETALLICS | 2010年 / 29卷 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

ALUMINUM COMPLEXES; ZINC-COMPLEXES; MAGNESIUM COMPLEXES; CATALYTIC-ACTIVITY; ALKOXIDE; LACTIDE; ANIONS; ALKYL; LIGAND;

D O I：

10.1021/om900669y

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Species of the form [LH](+)[BR4](-) (R = pentafluorophenyl, phenyl, 1) were synthesized by reaction of Bronsted acids with a novel bis-phosphinimine ligand (L = 4,6-(MesN-PPh2)(2)dibenzofuran). Corresponding cationic complexes [LMg '' Bu](+)[BR4](-) (2) were produced by reaction of [Mg '' Bu-2] with [LH](+)[BR4](-). Organomagnesium species 2a and 2b exhibit extremely high activity as initiators for the polymerization of epsilon-caprolactone, yielding near-quantitative conversion of monomer to high molecular weight (>2.0 x 10(5) g/mol) polymer in 4 min at ambient temperature.

引用

页码：1079 / 1084

页数：6

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