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Title: Kinetics and mechanism of oxidation of oxovanadium(IV) and its amino polycarboxylate and heterocyclic ligand complexes by peroxomonosulphate in orthophosphoric acid medium
Authors: Anandkumar, K
Sivaswaroop, P
Rao, P V Krishna
Issue Date: Nov-1991
Publisher: NISCAIR-CSIR, India
Abstract: Kinetics of oxidation of aquo oxovanadium(IV) and its complexes with ethylenediamine tetraacetate (edta), N-(2-hydroxy ethyl) ethylenediamine triacetate (hedta), 1,10-phenanthroline (phen) and 2,2'-bipyridyl (bipy) by peroxomonosulphate (PMS) in orthophosphoric acid {[H+]=(2.0-12.0) x 10-2 mol dm-3} medium has been investigated under pseudo-first order conditions using a stopped flow spectrophotometer by monitoring the decay of the substrate at 585 nm. The relative reactivities of these complexes have been found to be in the order VO > [VO(bipy)2]2+> [VO(edta)2- > [VO(phen)2]2+. In the oxidation of [VO(edta)]2-, both the protonated and unprotonated species of the complex compete for the oxidant.
Page(s): 966-970
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.30A(11) [November 1991]

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