The oxidation of 3,3′-dimethoxy benzidine with potassium bromate in acidic solutions |
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| Authors: | S. B. Jonnalagadda N. M. Munkombwe P. Hensman T. Mushinga |
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| Affiliation: | Department of Chemistry, University of Zimbabwe, P.O. Box MP 167, Mount Pleasant, Harare, Zimbabwe |
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| Abstract: | The kinetics and mechanism of the oxidation of 3,3′-dimethoxybenzidine (oda, o-dianisidine) by potassium bromate in aqueous acidic medium were studied by monitoring the formation rate of the reaction product, 3,3′-dimethoxy 4,4′-diphenoquinone at 447 nm. The reaction is, first order with respect to both the substrate and oxidant, and second order with respect to H+. The oda: bromate stoichiometric ratio is 1:1. Plausible mechanism and rate laws are proposed accounting the experimental findings. Computer simulations were done using the proposed mechanism. |
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