Shu-Ying HUO, Han-Wen SUN, Jin-Huan SHAN, Shi-Gang SHEN

Kinetics and mechanism of oxidation of 1,3-butylene glycol by dihydroxyditellutoargentate (III) in alkaline medium

The kinetics of oxidation of 1,3-butylene glycol (/3 — BG) by dihydroxyditelluto- argentate(III) were studied spectrophotometrically between 298.2 and 313.2 K in alkaline medium. The reaction rate showed pseudo-first order dependence in oxidant and fractional order in $beta$-BG. The pseudo-first order rate constant$k_{obs}$ increased with an increase in the concentration of OH~ and a decrease in the concentration of $TeO_4^{2-}$. There was a negative salt effect and no free radicals were detected. Thus, the dihydroxy-monotelluratoargentate(III) species is assumed to be the active species. The activation parameters along with the rate.constants of the rate-determining step were calculated.

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