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Kinetics and mechanism of oxidation of 1,2-butanediol by argentate(III) complex in alkaline medium

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Abstract

The kinetics of oxidation of 1,2-butanediol by dihydroxyditellutoargentate(III) (DDA) is studied spectrophotometrically. The reaction rate shows first order dependence in DDA and 1 < nap < 2 order in 1,2-butanediol. It is found that the pseudo-first order rate constant k obs increases with the increase in concentration of OH− and decreases with the increase in concentration of TeO4 2−. There is a negative salt effect; no free radical is detected. In view of this, the dihydroxymonotelluratoargentate(III) species is assumed to be the active species. A plausible mechanism involving a two-electron transfer is proposed and the rate equations derived from mechanism explains all experimental results. The activation parameters along with the rate constants of the rate-determining step are calculated.

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Authors and Affiliations

  1. College of Chemistry and Environmental Science, Hebei University, Baoding, 071002, China

    S. -Y. Huo, J. -H. Shan, S. -G. Shen & H. -W. Sun

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  1. S. -Y. Huo
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  2. J. -H. Shan
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  3. S. -G. Shen
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  4. H. -W. Sun
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Correspondence to S. -Y. Huo.

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Huo, S.Y., Shan, J.H., Shen, S.G. et al. Kinetics and mechanism of oxidation of 1,2-butanediol by argentate(III) complex in alkaline medium. JICS 3, 180–184 (2006). https://doi.org/10.1007/BF03245947

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  • DOI: https://doi.org/10.1007/BF03245947

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