(Salen)CrIIIX catalysts for the copolymerization of carbon dioxide and epoxides:: Role of the initiator and cocatalyst

被引：130

作者：

Darensbourg, DJ ^{[1
]}

Mackiewicz, RM ^{[1
]}

Rodgers, JL ^{[1
]}

Phelps, AL ^{[1
]}

机构：

[1] Texas A&M Univ, Dept Chem, College Stn, TX 77843 USA

来源：

INORGANIC CHEMISTRY | 2004年 / 43卷 / 06期

关键词：

D O I：

10.1021/ic0352856

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The copolymerization Of CO2 and cyclohexene or propylene oxide has been examined employing (salen)Cr(III)Nu complexes (Nu = Cl or N-3) as catalysts. The addition of various cocatalysts, including phosphines and PPN+ or Bu4N+ Cl- salts serves to greatly enhance the rate of copolymer production. In these instances, the mechanism of the initiation step appears to be unimolecular in catalyst concentration, unlike the bimolecular process cocatalyzed by N-methylimidazole. The copolymers were produced with >95% carbonate linkages with TOFs in the range 39-494 mol epoxide consumed/mol Cr.h. In the presence of phosphine cocatalysts, no cyclic carbonate was produced as a byproduct.

引用

页码：1831 / 1833

页数：3

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