Equilibrium studies on binary complex formation of lanthanide ions La(III), Pr(III), Sm(III), Gd(III) and Dy(III) with vitamin–U at constant temperature
By J. J. Vora, J. G. Gurjar, R. H. Chaudhari, R. A. Patel and D. R. Patel
The determination of formation constant of Binary Complexes(ML) , where M = La(III), Pr(III), Sm (III), Gd (III) And Dy (III) and L = Vitamin-U have been carried out using Irving- Rossotti titration technique in aqueous media at 25 ± 0.1ºC temperature . The ionic strength µ = 0.2M was held constant using sodium per chlorate as an electrolyte. The stability constant s of trivalent lanthanide vitamin-U complexes were calculated and explained. The mechanism, through which Protonation and complex formation takes place, has been suggested.
Key words: Vitamin-U, Stability constants, Lanthanides (III) Ions.