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

Michael E. Wilhelm; Michael H. Anthofer; Robert M. Reich; Valerio D’Elia; Jean-Marie Basset; Wolfgang A. Herrmann; Mirza Cokoja; Fritz Kühn

doi:10.1039/C3CY01057K

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

Michael E. Wilhelm, Michael H. Anthofer, Robert M. Reich, Valerio D’Elia, Jean-Marie Basset, Wolfgang A. Herrmann, Mirza Cokoja, Fritz Kühn

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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. This journal is © the Partner Organisations 2014.

Original language	English (US)
Pages (from-to)	1638-1643
Number of pages	6
Journal	Catalysis Science & Technology
Volume	4
Issue number	6
DOIs	https://doi.org/10.1039/C3CY01057K
State	Published - 2014

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@article{80565c8fbc85438da102f0705ea340fe,

title = "Niobium(v) chloride and imidazolium bromides as efficient dual catalyst systems for the cycloaddition of carbon dioxide and propylene oxide",

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. This journal is {\textcopyright} the Partner Organisations 2014.",

author = "Wilhelm, {Michael E.} and Anthofer, {Michael H.} and Reich, {Robert M.} and Valerio D{\textquoteright}Elia and Jean-Marie Basset and Herrmann, {Wolfgang A.} and Mirza Cokoja and Fritz K{\"u}hn",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: MEW, MHA and RMR thank the TUM Graduate School for financial support. The authors thank T. Hofmann for experimental assistance.",

year = "2014",

doi = "10.1039/C3CY01057K",

language = "English (US)",

volume = "4",

pages = "1638--1643",

journal = "Catalysis Science & Technology",

issn = "2044-4753",

publisher = "Royal Society of Chemistry",

number = "6",

}

TY - JOUR

T1 - Niobium(v) chloride and imidazolium bromides as efficient dual catalyst systems for the cycloaddition of carbon dioxide and propylene oxide

AU - Wilhelm, Michael E.

AU - Anthofer, Michael H.

AU - Reich, Robert M.

AU - D’Elia, Valerio

AU - Basset, Jean-Marie

AU - Herrmann, Wolfgang A.

AU - Cokoja, Mirza

AU - Kühn, Fritz

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: MEW, MHA and RMR thank the TUM Graduate School for financial support. The authors thank T. Hofmann for experimental assistance.

PY - 2014

Y1 - 2014

N2 - 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. This journal is © the Partner Organisations 2014.

AB - 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. This journal is © the Partner Organisations 2014.

UR - http://hdl.handle.net/10754/577047

UR - http://xlink.rsc.org/?DOI=C3CY01057K

UR - http://www.scopus.com/inward/record.url?scp=84900845138&partnerID=8YFLogxK

U2 - 10.1039/C3CY01057K

DO - 10.1039/C3CY01057K

M3 - Article

SN - 2044-4753

VL - 4

SP - 1638

EP - 1643

JO - Catalysis Science & Technology

JF - Catalysis Science & Technology

IS - 6

ER -

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

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