Studies on the Stability of V anadyl Chelates with Dithiodiacetic Acid and Diglycollic Acid

Department of Chemistry, Kurukshetra University, Kurukshetra-132 119, Haryana

Manuscript received 30 June 1979, revised 15 November 1979, accepted 25 December 1979

The proton-ligand stability constants of DTDAA and DGA and the stepwise stability constants of their chelates with VO(IV) have been determined in aqueous medium by potentiometric method at different ionic strengths, (0.1, 0.2 and 0.3M NaCIO₄) and temperatures (25° and 35°). Thermodynamic stability constants and thermodynamic parameters (∆G°, ∆H° and ∆S° ) have been calculated.