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Issue 6, 2014
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Niobium(V) chloride and imidazolium bromides as efficient dual catalyst systems for the cycloaddition of carbon dioxide and propylene oxide

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Abstract

The application of niobium(V) chloride and several imidazolium bromides as catalyst systems for the cycloaddition of propylene oxide (PO) with carbon dioxide to propylene carbonate (PC) is reported. A set of 31 different imidazolium bromides has been synthesized with varying substituents at all five imidazolium ring atoms, of which 17 have not been reported before. The impact of different substitution patterns (steric and electronic changes and solubility in PO) at the imidazolium ring on the catalytic activity was investigated. The optimisation of the catalyst structure allows for the valorisation of carbon dioxide under mild reaction conditions with high reaction rates in very good yield and selectivity for PC.

Graphical abstract: Niobium(v) chloride and imidazolium bromides as efficient dual catalyst systems for the cycloaddition of carbon dioxide and propylene oxide

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Publication details

The article was received on 15 Dec 2013, accepted on 18 Feb 2014 and first published on 19 Feb 2014


Article type: Paper
DOI: 10.1039/C3CY01057K
Citation: Catal. Sci. Technol., 2014,4, 1638-1643
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    Niobium(V) chloride and imidazolium bromides as efficient dual catalyst systems for the cycloaddition of carbon dioxide and propylene oxide

    M. E. Wilhelm, M. H. Anthofer, R. M. Reich, V. D'Elia, J. Basset, W. A. Herrmann, M. Cokoja and F. E. Kühn, Catal. Sci. Technol., 2014, 4, 1638
    DOI: 10.1039/C3CY01057K

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