Abstract
Complexation of some bivalent transition metal with halide and pseudohalide ions has been studied by calorimetry and spectrophotometry in some nonaquenus solvents and their mixtures. Formation costants, enthalpies and entropies of formation of complexes vary strongly depending on the solvent. Solvent effects on the thermodynamic parameters are discussed in terms of solvation of ions and solvent-solvent interactions in the bulk. The coordination structure change upon complexation, which occurs in a different manner depending on the metal ion and ligand, will be also discussed.
