Hydration behavior of mixed ligand chromium complexes. Part I: partial molar volumes and partial molar adiabatic compressibilities of oxalato and mixed oxalato ? Ethylxanthato chromate(III) complexes

Abstract

Densities and ultrasonic velocities in aqueous solutions of cis-K[Cr(ox)2(H2O)2], K3[Cr(ox)3] and KSSCOC2H5 and a mixed ligand complex K2[Cr(ox)2SSCOC2H5], where SSCOC2H5 is the ethylxanthate ligand, have been measured at 25, 35 and 45°C. Limiting partial molar volumes, partial molar adiabatic compressibilities and hydration numbers of the complex salts as well as of the ligand have been calculated. The implication of the findings are discussed.