Complexes of Thiovanol with UO2+, Zn2+ and Pb2+

P. G. Department of Chemistry, Bhagalpur University, BhagaIpur-812 007

Manuscript received 16 April 1977, revised 18 December 1977, accepted 7 July 1978

Complex compounds of thiovanol with UO⁺²₂, Zn⁺² and Pb⁺² have been isolated. UO⁺²₂ forms a yellow coloured complex at \(p\)H 4.5 having 1 : 1 : : metal : ligand stoichio­metry and an orange yellow coloured complex at pH 8.5 having 1 : 2 : : M : L. Zn⁺² and Pb⁺² form colourless complexes with thiovanol at \(p\)H 7.5-8.0 having 1: 2 :: M : L stoichiometry. Infrared spectral studies on these complexes indicate that sulphydryl (— SH) and primary alcoholic (— OH) groups are involved in coordination. These systems have also been \(p\)H-metrically studied. UO⁺²₂ forms only one complex in solution, Zn⁺² and Pb⁺² form complexes in solution having 1 : 2 : : M : L stoichiometry.