Reductive Deoximation of Certain Oximes by Electrolytically Generated Vanadium(II) in Aqueous Sulphuric Acid Media

Abstract

Vanadium(II) species generated by the cathodic reduction of

vanadium(II) sulphate using mercury pool cathode under nitrogen atmosphere

has been characterised by UV-visible spectra and by the determination

of redox potential of V(III)/v(II) couple. The purity of V(II) species

has been tested by potentiometric titration with standard cerium(IV) solution

where the species gets oxidised to V(V) in three steps corresponding

to three equivalent points. The reductive estimation of hydroxylamine

hyrochloride and its keto and aldehyde oxime derivatives using V(II) was

carried out. The reaction products were isolated, indentified and characterised

by the literature methods. The utility of V(II) as a reductant in

analytical studies has been highlighted.