Kim, HS Kim, JJ Kim, H Jang, HG 2024-01-21T08:03:23Z 2024-01-21T08:03:23Z 2021-09-03 2003-11-15 0021-9517 https://pubs.kist.re.kr/handle/201004/138087 Imidazolium zinc tetrahalides, (1-R-3-methylimidazolium)(2)ZnX2Y2 (R = CH3, C2H5, n-C4H9, CH2C6H5; 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-) > [ZnBr2C](2-) much greater than [ZnCl4](2-). The turnover frequencies (TOF: h(-1)) increased with increasing temperature, but remained almost unchanged with the increase of pressure. (C) 2003 Elsevier Inc. All rights reserved. English ACADEMIC PRESS INC ELSEVIER SCIENCE CARBON-DIOXIDE EPOXIDES OXIRANES CYCLOADDITION Imidazolium zinc tetrahalide-catalyzed coupling reaction of CO2 and ethylene oxide or propylene oxide Article 10.1016/S0021-9517(03)00238-0 1 JOURNAL OF CATALYSIS, v.220, no.1, pp.44 - 46 JOURNAL OF CATALYSIS 220 1 44 46 scie scopus 000186260800005 2-s2.0-0142217953 Chemistry, Physical Engineering, Chemical Chemistry Engineering Article CARBON-DIOXIDE EPOXIDES OXIRANES CYCLOADDITION zinc halide imidazolium halide zinc tetrahalide ionic liquid ethylene oxide propylene oxide carbon dioxide cyclic carbonate ethylene carbonate propylene carbonate