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Scope of chemical fixation of carbon dioxide catalyzed by a bifunctional monomeric tungstate

Paper ID Volume ID Publish Year Pages File Format Full-Text
54521 47012 2014 7 PDF Available
Title
Scope of chemical fixation of carbon dioxide catalyzed by a bifunctional monomeric tungstate
Abstract

•A simple monomeric tungstate is efficient for chemical fixation of CO2.•Compound I showed bifunctional activation of both CO2 and nucleophiles.•Various kinds of nucleophiles could be converted into the corresponding products.

The tungsten-oxo moiety in a simple monomeric tungstate, TBA2[WO4] (I, TBA = tetra-n-butylammonium), showed bifunctional activation of both CO2 and 1,2-phenylenediamine (1a). It was confirmed by 1H, 13C, and 183W NMR spectroscopies that adducts I–1a and I–(CO2)n (n = 1 and 2) were formed by the reactions of I with 1a and CO2, respectively. These adducts played important roles in formation of the corresponding carbamic acid intermediates. The present bifunctionality could be applied to chemical fixation of CO2 even at atmospheric pressure with various kinds of structurally diverse aryl diamines, primary monoamines, propargylic alcohols, and propargylic amines into cyclic urea derivatives, 1,3-disubstituted urea derivatives, cyclic carbonates, and cyclic carbamates, respectively.

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Keywords
Carbon dioxide fixation; Homogeneous catalysis; Tungstate
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Scope of chemical fixation of carbon dioxide catalyzed by a bifunctional monomeric tungstate
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 226, 1 May 2014, Pages 160–166
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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