Polymorphic Properties of Ionic Liquid of 1-Isopropyl-3-methylimidazolium Bromide

• Masatoshi Kawahata

  School of Pharmaceutical Sciences at Kagawa Campus, Tokushima Bunri University

• Takatsugu Endo

  Graduate School of Science and Technology, Chiba University

• Hiroko Seki

  Chemical Analysis Center, Chiba University

• Keiko Nishikawa

  Graduate School of Science and Technology, Chiba University

• Kentaro Yamaguchi

  School of Pharmaceutical Sciences at Kagawa Campus, Tokushima Bunri University

Abstract

The crystal structure of an ionic liquid, 1-isopropyl-3-methylimidazolium bromide ([i-C3mim]Br), was studied using X-ray crystallographic analysis. The structures of three independent conformers of the isopropyl moiety were determined. Although the three conformers are classified into a group and their structures differ from the conformer described by Golovanov et al., the crystal structures are similar with respect to the inter-ionic interactions between [i-C3mim]+ and Br−. This polymorphic property of the ionic liquid is interpreted as arising because the enthalpy gain from the stronger Coulomb interactions determines a tight framework for the arrangement of Br− and the more positive moiety of the imidazolium ring. Thus, the isopropyl moiety is able to occupy the space within the framework in various conformations.

Journal

• Chemistry Letters

  Chemistry Letters 38 (12), 1136-1137, 2009-10-31

  Oxford University Press (OUP)

Keywords

• General Chemistry

Details

• CRID: 1360283694087938816
• NII Article ID: 10027175481
• NII Book ID: AA00603318
• DOI: 10.1246/cl.2009.1136
• ISSN: 13480715
• ISSN: 03667022
• Web Site: https://academic.oup.com/chemlett/article-pdf/38/12/1136/55600990/cl.2009.1136.pdf
• Data Source:
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  • CiNii Articles