Kinetics and mechanism of oxidation of aquaethylenediaminetetraacetatocobaltate(II) by <Emphasis Type="Italic">N</Emphasis>-bromosuccinimide in aqueous acidic solution |
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| Authors: | Nasma D Eljack Yousif Sulfab |
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| Institution: | (1) Department of Chemistry, Faculty of Science, University of Khartoum, P. O. Box 321, Khartoum, Sudan; |
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| Abstract: | The oxidation of aquaethylenediaminetetraacetatocobaltate(II) Co(EDTA)(H2O)]−2 by N-bromosuccinimide (NBS) in aqueous solution has been studied spectrophotometrically over the pH 6.10–7.02 range at 25 °C.
The reaction is first-order with respect to complex and the oxidant, and it obeys the following rate law:
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\textRate = k\textet K 2 K 3 \textCo\textII ( \textEDTA )( \textH 2 \textO ) - 2 ]\textT \textNBS] \mathord | / |
\vphantom \textNBS] ( \textH + ] + K 2 ) ( \textH + ] + K 2 ) {\text{Rate}} = k^{\text{et} } K_{ 2} K_{ 3} \left {{\text{Co}}^{\text{II}} \left( {\text{EDTA}} \right)\left( {{\text{H}}_{ 2} {\text{O}}} \right)^{ - 2} } \right]_{\text{T}} {{{\text{NBS}}]} \mathord{\left/ {\vphantom {{{\text{NBS}}]} {\left( {\left {{\text{H}}^{ + } } \right]{ + }K_{ 2} } \right)}}} \right. \kern-\nulldelimiterspace} {\left( {\left {{\text{H}}^{ + } } \right]{ + }K_{ 2} } \right)}} |
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