Allylimidazolium Halides as Novel Room Temperature Ionic Liquids

Liquid state halide salts composed of imidazolium cations having allyl groups were prepared. Their ionic conductivity, viscosity, and thermal properties were investigated. Introduction of allyl group on N-position effectively suppressed the crystallization of the corresponding salts. 1,3-diallyl imidazolium halides therefore showed considerably lower viscosity and higher ionic conductivity than other halide salts.