The Structure of a Room‐Temperature Ionic Liquid with and without Trace Amounts of Water: The Role of CH⋅⋅⋅O and CH⋅⋅⋅F Interactions in 1‐<i>n</i>‐Butyl‐3‐Methylimidazolium Tetrafluoroborate

Abstract

Solvated solvents: Water molecules interact with the imidazolium cation and [BF4]− ion (see picture) of the molten ionic-liquid salt 1-n-butyl-3-methylimidazolium tetrafluoroborate. Evidence for short CH⋅⋅⋅O and CH⋅⋅⋅F interactions is provided by 1H{1H} and 1H{19F} NMR spectroscopy nuclear Overhauser enhancements.