ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Thermodynamic Functions of Transfer of Tetraalkylammonium Reineckates from Water to Water—Methanol and Water—t-Butyl Alcohol Mixtures

V. Holba

Department of Physical Chemistry, Faculty of Natural Sciences, Comenius University, SK-842 15 Bratislava

Abstract: The solubility of tetraalkylammonium diamminetetraisothiocyanato chromates(III) (alkyl = methyl, ethyl, 1-propyl, and 1-butyl) was measured in water and in water-methanol and water-t-butyl alcohol mixtures as a function of temperature and solvent composition. The results have been used to evaluate the Gibbs energy, enthalpy and entropy of transfer of the investigated salts from water to water-alcohol mixed solvents. The dependence of the thermodynamic transfer functions on concentration of organic cosolvents is discussed in terms of the cosolvent effect on the cluster structure of water.

Full paper in Portable Document Format: 505a253.pdf

Chemical Papers 50 (5) 253–257 (1996)