Collect. Czech. Chem. Commun. 2000, 65, 1455-1463

Transfer Thermodynamic Functions ∆Gt0, ∆Ht0 and TSt0 of cis- and trans-[CoCl2(en)2]+ Isomers in Aqueous Mixtures of Methanol, tert-Butyl Alcohol and Acetonitrile

Oľga Vollárová* and Ján Benko

Department of Physical Chemistry, Comenius University, 842 15 Bratislava, Slovak Republic


The solubility, partial molar volume and standard integral molar enthalpy of solution of cis- and trans-[CoCl2(en)2]Cl in water, aqueous methanol, aqueous tert-butyl alcohol and aqueous acetonitrile are reported. The transfer functions ∆Gt0, ∆Ht0 and TSt0 as well as partial molar volumes are used to obtain information on the solute-solvent interactions. Results obtained are discussed in terms of differences in the surface charge distribution in isomeric coordination species.

Keywords: Complex ions; Solvation; Transfer thermodynamic functions; Partial molar volumes; Thermodynamics; Cobalt; Solubility.

References: 19 live references.