Formation Constants of Mixed Ligand Complexes of Oxovanadium(IV) with Salicylic Acid/5 - Sulphosalicylic Acid/8-Hydroxyquinoline -5- Sulphonic Acid and Hippuric Acid

Department of Chemistry. J. V. College, Baraut-250 611 Manuscript received 14 February 1980, revised 16 September 1980, accepted 28 January 1981 Equilibrium studies are described on the interaction of oxovanadium(IV) with salicylic acid (SA)/5-sulphosalicylic acid (SSA)/8-hydroxyquinoline-5-sulphonic acid (HQSA) in presence of hippuric acid. The formation of 1 : 1 : 1 mixed ligand complexes and their hydroxo derivatives inferred from the pH—metric titration curves and formation constants of 1 : 1 : 1 ternary complexes have been evaluated at 30 \(\pm\) 0.5° (\(\mu\) = 0.1 M KNO3). The order of stability of ternary complexes has been found to be the same as that of 1 : 1 binary complexes involving hydroxy acids