Solvation of ions. XXIV. Entropies of transfer of some divalent metal ions from water to nonaqueous solvents
Hedwig, G.R., Owensy, D.A. and Parker, A.J. (1975) Solvation of ions. XXIV. Entropies of transfer of some divalent metal ions from water to nonaqueous solvents. Journal of the American Chemical Society, 97 (14). pp. 3888-3894.
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Standard free energies (molar scale) for the transfer of Cd2+, Zn2+, and Ba2+ from water to methanol, hexamethylphosphoramide, acetonitrile, dimethylformamide, and dimethyl sulfoxide have been obtained by means of extrathermodynamic assumptions. Corresponding standard entropies of transfer have also been obtained using enthalpies of transfer from an earlier paper. There is a much larger decrease of entropy when divalent rather than monovalent cations are transferred from water to these nonaqueous solvents. Results are discussed in terms of current models of ion solvation. Divalent cations have more than one layer of solvent molecules in their solvation shells in most of the solvents studied. HMPT has par- ticularly strong enthalpic and entropic interactions with cations.
|Publication Type:||Journal Article|
|Murdoch Affiliation:||School of Mathematical and Physical Sciences|
|Publisher:||American Chemical Society|
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