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Kinetics of the oxidation of octacyanomolybdate(IV) by periodate in aqueous acid

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Summary

The kinetics of oxidation of [Mo(CN)8]4− by IO −4 in aqueous acid is described by the equation: d[{Mo(CN)8}3−]/ dt=2k3[{Mo(CN)8}4−][IO −4 ][H+]. Unlike IO −4 oxidations of [Fe(CN)6]4− and [W(CN)8]4−, no [H+] independent term exists in the [Mo(CN)8]4− reaction, which indicates that, in neutral and alkaline solutions, oxidation of [Mo(CN)8]4− is thermodynamically unfavourable. An inner-sphere mechanism, consistent with the rate law, is proposed. This conclusion is based, in the absence of direct evidence, on the observed behaviour of IO −4 as an inner-sphere oxidant.

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Authors and Affiliations

  1. Department of Chemistry, University of Kuwait, P.O. Box 5969, Kuwait

    Mohamed Ali Hussein & Yousif Sulfab

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  1. Mohamed Ali Hussein
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  2. Yousif Sulfab
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Hussein, M.A., Sulfab, Y. Kinetics of the oxidation of octacyanomolybdate(IV) by periodate in aqueous acid. Transition Met Chem 7, 181–183 (1982). https://doi.org/10.1007/BF01035838

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