Imidazolium zinc tetrahalide-catalyzed coupling reaction of CO2 and ethylene oxide or propylene oxide

Hoon Sik Kim, Jai Jun Kim, Honggon Kim, Ho Gyeom Jang

Research output: Contribution to journalArticle

150 Citations (Scopus)


Imidazolium zinc tetrahalides, (1-R-3-methylimidazolium) 2ZnX2Y2 (R=CH3, C2H 5, n-C4H9, CH2C6H 5; X=Cl, Br; Y=Cl, Br), prepared by reacting ZnX2 with (1-R-3-methylimidazolium)Y, were found to have surprisingly high activities for the coupling reaction of CO2 and ethylene oxide or propylene oxide to produce corresponding cyclic carbonate. The catalytic activity of imidazolium zinc tetrahalide was greatly influenced by the nature of halide groups bonded to the zinc center. The catalytic activity was found in the order of [ZnBr4]2->[ZnBr2Cl2] 2-≫[ZnCl4]2-. The turnover frequencies (TOF: h-1) increased with increasing temperature, but remained almost unchanged with the increase of pressure.

Original languageEnglish
Pages (from-to)44-46
Number of pages3
JournalJournal of Catalysis
Issue number1
Publication statusPublished - 2003 Nov 15



  • Carbon dioxide
  • Cyclic carbonate
  • Ethylene carbonate
  • Ethylene oxide
  • Imidazolium halide
  • Ionic liquid
  • Propylene carbonate
  • Propylene oxide
  • Zinc halide
  • Zinc tetrahalide

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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