Thermodynamics of complex formation of silver with amines in dimethyl sulphoxide

Abstract

Equilibrium constants, enthalpy changes, and entropy changes have been determined for the complex formation between silver and a number of amines in dimethyl sulphoxide (dmso) at 25 °C. The ionic strength of the solutions was kept at 0.1 mol dm^–3 with tetraethylammonium perchlorate. All the complexes are enthalpy stabilized, whereas the entropy contributions oppose the complex formation. The values of the thermodynamic parameters obtained in dmso are compared with those for the same systems in aqueous solution. The data are also discussed in relation to the different solvations of the species in water and dmso.