Physico-chemical Investigation on Some Mixed-Ligand Complexes of Dioxouranium(VI), Part-I

Abstract

Mixed-ligand complex studies of UO₂(VI) using nitrilotriacetic
acid and iminodiacetic acid as primary ligands and lactic acid and
protocatechuic acid as secondary ligands have been carried out
potentiometrically at three different temperatures 20, 35, 50^oC and
μ= 0.2 M (KNO₃). The thermodynamic parameters, viz., ΔG, ΔH
and ΔS have been evaluated. The ΔG and ΔH values have been
further separated into their electrostatic components ΔG_e and ΔH_e
and cratic components ΔG_c, ΔH_c. The results are correlated on the
basis of structural characteristics of the chelates formed.