Studies on Mixed Ligand Complexes of Uranyl With Pyridoxine (Vitamin B6) and Some Bicarboxylic Acids at Dme

Gaurav Sharma and C. P. Singh Chandel*

Department of Chemistry, University of Rajasthan, Jaipur - 302 004 (India)

The stability constants of ternary complexes of uranyl (II) with pyridoxine and bicarboxylic acids (Malic, Malonic, Tartaric and Oxalic) have been determined at 30°C and μ=0.1 (KNO3). Uranyl ion individually forms 1:1 and 1:2 complexes with all the ligands. The reduction of the complexes in each case is reversible and diffusion controlled. UO2 forms three mixed species viz. UO2 (bicarboxylate) (pyridoxinate), UO2 (pyridoxinate) (bicarboxylate)2 and UO2 (bicarboxylate)2 (pyridoxinate)

Ternary complexes; Uranyl (II); pyridoxine; bicarboxylic acids