Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Lithium Chloride-Imidazolium Chloride Melts for the Coupling Reactions of Propylene Oxide and CO2

  • Nguyen, Ly Vinh (Department of Chemistry and Research Institute of Basic Sciences, Kyung Hee University) ;
  • Lee, Bo-Ra (Department of Chemistry and Research Institute of Basic Sciences, Kyung Hee University) ;
  • Nguyen, Dinh Quan (Environment and Process Division, Korea Institute of Science and Technology) ;
  • Kang, Min-Jung (Bioanalysis & Biotransformation Center, Korea Institute of Science and Technology) ;
  • Lee, Hyun-Joo (Environment and Process Division, Korea Institute of Science and Technology) ;
  • Ryu, Seol-Ryu (Department of Chemistry and Research Institute of Basic Sciences, Kyung Hee University) ;
  • Kim, Hoon-Sik (Department of Chemistry and Research Institute of Basic Sciences, Kyung Hee University) ;
  • Lee, Je-Seung (Department of Chemistry and Research Institute of Basic Sciences, Kyung Hee University)
  • Published : 2008.01.20
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Abstract

A series of lithium chloride-imidazolium chloride (LiCl-[imidazolium]Cl) melts were prepared and their catalytic activities were evaluated for the coupling reactions of propylene oxide and CO2. At the constant mole of LiCl, the catalytic activities of LiCl-[imidazolium]Cl melts increased with increasing molar ratio of [imidazolium]Cl/LiCl up to 2, but thereafter decreased rapidly. The variation of alkyl groups on the imidazolium ring showed a negligible effect on the catalytic activity, but the number of alkyl groups present on the imidazolium cation exerts a pronounced effect. Catalysis and electrospray ionization tandem mass spectral analysis results of LiCl-[imidazolium]Cl melts imply that the activity of the melt is strongly related to the amount of LiCl2- generated from the melt.

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