SOME REMARKS ON THE INTERACTIONS OF NABPH(4) AND PH(4)PX WITH SOLVENTS

The enthalpies of solution of NaBPh4 in mixtures of water and methanol , sec-butanol or dimethyl sulphoxide, and those of Ph4AsCl in mixtures of water and sec-butanol or acetonitrile, as well the density of sec- butanol-water mixed solvent, have been measured at a temperature of 29 8.15 K. Enthalpic pair interaction coefficients of the organic salt-co solvent have been calculated (h(xy)). The relationships h(xy) = f(v(PH I22)) for the salts under investigation have been plotted and discusse d. It has been confirmed that the interactions of both salts with the mixed solvent, and particularly with water, are different.