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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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Correspondence to S. -Y. Huo.

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Huo, S.-., Shan, J.-., Shen, S.-. 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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Keyword

  • Dihydroxyditellutoargentate(III)
  • 1,2-Butanediol
  • Redox reaction
  • Kinetics and mechanism