Reaction Kinetics and Catalysis Letters

, Volume 67, Issue 1, pp 67–73 | Cite as

Osmium(VIII) catalyzed oxidation of tellurium(IV) by periodate in aqueous alkaline medium

  • M. R. Kembhavi
  • A. L. Harihar
  • S. T. Nandibewoor
Article
  • 37 Downloads

Abstract

Osmium(VIII) catalyzed oxidation of tellurium(IV) by periodate in alkaline medium is found to occurvia oxidant-catalyst complex formation in a slow step followed by the interaction of substrate and complex in the fast step to yield the products with regeneration of catalyst. One of the products, Te(VI), considerably retards the rate of reaction. The reaction shows zero order in [tellurium(IV)], first order each in [IO4] and [Os(VIII)] and an inverse fractional order dependence on [OH]. A plausible mechanism is proposed and the reaction constants involved in the mechanism are derived.

Keywords

Osmium(VIII) catalysis tellurium(IV) periodate 

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Copyright information

© Akadémiai Kiadó 1999

Authors and Affiliations

  • M. R. Kembhavi
    • 1
  • A. L. Harihar
    • 1
  • S. T. Nandibewoor
    • 1
  1. 1.P.G. Department of Studies in ChemistryKarnatak UniversityDharwadIndia

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