Thermodynamic and physical behavior of binary mixtures involving sulfolane. Excess volumes and dielectric constants of sulfolane-nitrobenzene mixtures

The volumes of mixing and dielectric constants of nitrobenzene-sulfolane mixtures were measured, at several temperatures ranging within 288.16-333.16 K, over the entire composition range. The observed deviations from ideality, decreasing with increasing temperature, are interpreted as not indicative of significant interactions between unlike molecules; autoassociation of nitrobenzene, in a small region close to pure substance, may not be quite excluded. © 1980 American Chemical Society.