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Studies In Formation Constant of UO2 (II) and TH (IV) Metal Ion Complexes with Some Substituted Benzothiazoles at 0.1 M Ionic Strength

V. B. Khobragade, M. L. Narwade, S. S. Sonare and P. D. Sawalakhe

Substituted 1,3-benzothiazole derivatives are an important class of heterocyclic compounds. In recent years heterocyclic compounds analogues and derivatives have attracted strong interest due to their biological and pharmacological properties. The present study deals with the evaluation of proton-ligand and metal-ligand stability constants of UO2 (II) and Th (IV) metal ions with 3-(2-hydroxyphenyl)-5-5bromo-7-methyl-l,2,4-triazolo (3,4,b) benzothiazole (L1) and 3-(2-hydroxy- 3-methylphenyl)-5-bromo-7-methyl-l,2,4-triazol (l,4,b) benzothiazole (L2) at 0.1 M ionic strength pH-metrically. The values of n ,n, A pK and log K are evaluated in 70% dioxane-water mixture.