Thermodynamics of imidazolium based ionic liquids with cyano containing anions

© 2017 Elsevier B.V. Thermochemical investigation of the series of 1-alkyl-3-methylimidazolium ionic liquids with B(CN) 4 and PF 2 (CN) 4 anions is presented. Absolute vapor pressures and vaporization enthalpies have been measured by using quartz-crystal microbalance. Gas-phase enthalpies of formation of ILs were calculated by using the high-level quantum-chemical method G3MP2. From a combination of experimental and theoretical results, the enthalpy of formation of aqueous B(CN) 4 ion was derived for the first time