Thermal and volumetric properties of methanol–hexamethylphosphortriamide mixtures under standard conditions

Abstract

Enthalpic and volumetric characteristics of mixing in a methanol (MeOH)–hexamethylphosphortriamide (HMPT, 2) mixture are studied. Based on an analysis of concentration changes in the obtained data and the calculated partial molar characteristics, it is shown that at 0.2 molar fractions > х₂ > 0.7 molar fractions, the variation in the composition of the mixture slightly alters the character of intermolecular interactions characteristic of pure components. It is found that MeOH–HMPT mixtures experience most changes in intermolecular interaction and structure within the range of 0.2–0.7 molar fractions of HMPT.