Thermodynamic and spectroscopic properties of 2-pyrrolidinones .7. Delta Epsilon(N)(T) for binary solvent mixtures of 2-pyrrolidinone and N-methylbenzenesulfonamide at 30 and 50 degrees C

Delta E(T)(N) values for 2-pyrrolidinone and N-methylbenzenesulfonamide solvent systems, in which the solvents were benzyl alcohol, 1,4-dioxane and hexamethylphosphoric triamide, were determined over the whole mole fraction range. The study was carried out at 30 and 50 degrees C. The Delta E(T)(N) values were positive for all of these systems, with the exception of the 2-pyrrolidinone-hexamethylphosphoric triamide system, which was slightly negative. The results are discussed in terms of intermolecular interactions and preferential solvation.