Development of Abraham model correlations for enthalpies of solvation of solutes dissolved in N-methylformamide, 2-pyrrolidone and N-methylpyrrolidone

Abstract

Enthalpies of solution at infinite dilution have been determined for 2-propanol, ethylene glycol, 1,3-butanediol, 1,4-butanediol, phenol, 1-naphthol, 3-nitrophenol, 4-nitrophenol, 4-chlorophenol, and formamide dissolved in N-methylformamide, 2-pyrrolidone, and N-methylpyrrolidone at 298.15 K, as well as for N-methylformamide dissolved in 2-pyrrolidone and N-methylpyrrolidone, based on solution calorimetric measurements. Results of our experimental measurements, combined with published literature data, have been used to derive Abraham model expressions for predicting the enthalpies of solvation of solutes dissolved in the three fore-mentioned amide solvents. Our derived mathematical expressions back-calculated the observed enthalpy of solvation data to within a standard deviation of 3.1 kJ mol−1 or less.