SOLUTE-SOLUTE INTERACTION ENTHALPIES IN SOLUTIONS OF COPPER(II) CHLORIDE IN ORGANIC-SOLVENTS HAVING NITROGEN DONOR ATOMS

The dissolution behaviour of anhydrous cupric chloride (i) in solvents having a nitrogen donor atom (S) such as aniline, o-toluidine, pyridi ne, formamide and N,N-dimethyl-formamide, has been studied at 298.15 K by determining molar enthalpies of dilution of S(i) (a solvent S satu rated with i). The data, when analysed in terms of the Mayer-McMillan approach, yielded binary (h(ii)) and ternary (h(iii)) interactional en ergy parameters of i in these solvents and have been utilized to expla in the different extent of solubility of CuCl2 in the above-mentioned solvents. The analysis of the h(ii) data has further suggested that h( ii) and h(iii) should necessarily vary in opposite directions.