Partial molar volume and ultrasonic studies of cobalt (III) complexes in aqueous and binary aqueous media at different temperatures

Abstract

Studies of apparent molar volume have been made in the solutions of <i>trans- </i>bis<i> </i>(1,2-diaminoethane) (amino-carboxylato) halogeno cobalt (III) complexes containing the carboxylato-bonded aminoacids, e.g. glycine, α-alanine and β-alanine in water, water+acetone (5,10 & 20 wt %) and water+alcohol

(5 wt % each of methanol, ethanol and <i>n</i>-propanol) mixtures at 298.15, 303.15, 308.15 and 313.15 K to evaluate apparent molar properties. Studies of ultrasonic velocity have also been made for the solutions of these complexes in these solvents at 303.15, 308.15 and 313.15 K to evaluate various acoustic parameters. The results are discussed in the light of ion-ion and ion-solvent

interactions and of structural effects of the solvent in solutions.