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Trifluoromethanesulfonate

CAS No.: 37181-39-8

  • Molecular Formula: CF₃O₃S⁻
  • Molecular Weight: 149.07 g/mol

Chemical type

  • Anion (organic sulfonate)

Key properties

  • Hydrolytically stable
  • Strong S=O bond (resilient to frequency shift under pressure)
  • Often paired with imidazolium, pyrrolidinium, or ammonium cations
  • Anion in ionic liquids for electrochemical applications
  • Alternative to BF₄⁻ and PF₆⁻ in moisture-sensitive reactions

Classification by use

  • Ionic liquid components
  • Electrolyte materials

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  1. Temperature and Pressure Dependence of the Infrared Spectrum of 1-Ethyl-3-Methylimidazolium Trifluoromethanesulfonate Ionic Liquid, Appl. Sci., 2020, 10(12), 4404