Copolymerization of CO2 and Cyclohexene Oxide: β-Diketiminate-Supported Zn(II)OMe and Zn(II)Et Complexes as Initiators

被引：22

作者：

Rajendran, N. M. ^{[1
]}

Haleel, A. ^{[1
]}

Reddy, N. Dastagiri ^{[1
]}

机构：

[1] Pondicherry Univ, Dept Chem, Pondicherry 605014, India

来源：

ORGANOMETALLICS | 2014年 / 33卷 / 01期

关键词：

DIIMINATE ZINC CATALYSTS; CARBON-DIOXIDE; ALTERNATING COPOLYMERIZATION; PROPYLENE-OXIDE; CO2/EPOXIDE COPOLYMERIZATION; MECHANISTIC ASPECTS; HIGHLY EFFICIENT; EPOXIDES; POLYMERIZATION; REACTIVITY;

D O I：

10.1021/om400977c

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

beta-Diketiminate ligands with varying degrees of steric bulkiness and having -CN and -NO2 groups on N-aryl substituents were synthesized. The catalytic activity of some of their [LZnEt] and [LZnOMe](2) complexes (L = beta-diketiminato) toward the copolymerization of carbon dioxide and cyclohexene oxide was explored. All the catalysts were found to be highly active and showed very good turnover frequency, and the polycarbonates produced have a very high percentage of carbonate linkages. The complex [LiPr,Me-CNZnEt] showed very high activity and selectivity on par with its zinc methoxide analogue. The polymers produced by [LZnEt] complexes displayed a bimodal molecular weight distribution.

引用

页码：217 / 224

页数：8

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