Enthalpies of solution of some uni-univalent electrolytes in hexamethylphosphotriamide at 298.15 K

Abstract

Enthalpies of solution of various uni-univalent electrolytes in hexamethylphosphotriamide (HMPT) have been measured at 298.15 K. Ionic enthalpies of transfer from water to HMPT and from HMPT to propylene carbonate (PC) were calculated on the basis of the assumption that the transfer enthalpy of the tetraphenylboride ion is the same as that of the tetraphenyl-arsonium ion. The results are compared with those of the same ions in other solvent pairs and discussed in terms of specific ion–solvent interactions.