Prediction of the enthalpies of vaporization for roomerature ionic liquids: Correlations and a substitution-based additive scheme

Abstract

© 2015 Elsevier B.V. All rights reserved. The literature data on the enthalpies of vaporization for aprotic ionic liquids (ILs) published by the end of May 2014 were analyzed and the most reliable Δ<inf>l</inf>^gH<inf>m</inf> values were derived for 68 ILs. The selected enthalpies of vaporization were correlated with density and surface tension using symbolic regression and a number of effective correlation equations were proposed. The substitution-based incremental scheme for prediction of the enthalpies of vaporization of imidazolium, pyridinium and pyrrolidinium ILs was developed. The standard error of the regression for the developed scheme is significantly lower than that for the atom-based group-contribution schemes proposed earlier.