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KMID : 1059519860300010057
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Journal of the Korean Chemical Society
1986 Volume.30 No. 1 p.57 ~ p.62
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Kinetic Studies on the Oxidation of Oxalatoaquamolybdenum(IV) Trimer by Hydrogen Chromate Ion
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Kim Chang-Su
Kwon Chang-Yong
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Abstract
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Oxidation of [Mo3O4(C2O4)3(H2O)3]2- with HCrO4- yields the molybdenum(Ⅳ) complex, [Mo2O5(C2O4)2(H2O)2]2-. Stoichiometry for the reaction of [Mo3O4(C2O4)3(H2O)3]2- with HCrO4- are expressed as 2Mo3Ⅳ + 4CrⅥ → 3Mo2Ⅵ + 4CrⅢ. Observed rate constants are dependent on hydrogen ion concentration. The kinetic data are consistent with a mechanism in which three successive single-electron steps convert CrⅥ to CrⅢ by way of intermediate CrⅤ and CrⅣ. Detailed mechanisms are presented and discussed.
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