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Kinetics and mechanism of oxidation of (ethylenediaminediacetato)chromium(III) by N-bromosuccinimide

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Abstract

The kinetics of oxidation of (ethylenediaminediacetato)-chromium(III), [Cr(EDDA)(OH2)2]+, by N-bromosuccinimide (NBS) in aqueous solution to yield CrVI have been studied spectrophotometrically over the 20–40°C range. The reaction rate is first order with respect to both [NBS] and [CrIII], and increases with pH over the range 4.8–5.8. The activation parameters were calculated. A mechanism in which deprotonated [CrIII(EDDA)(OH2)(OH)] is the reactive species is suggested. The electron transfer may proceed via an inner sphere mechanism through bridging of the two reactants by the hydroxo ligand.

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Authors and Affiliations

  1. Chemistry department, Faculty of Science at Beni-Suef, Cairo University, Beni-Suef City, Egypt

    Ahmed A. Abdel-Khalek & Eman S. H. Khaled

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  1. Ahmed A. Abdel-Khalek
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  2. Eman S. H. Khaled
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Abdel-Khalek, A.A., Khaled, E.S.H. Kinetics and mechanism of oxidation of (ethylenediaminediacetato)chromium(III) by N-bromosuccinimide. Transition Metal Chemistry 24, 189–192 (1999). https://doi.org/10.1023/A:1006921605069

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  • DOI: https://doi.org/10.1023/A:1006921605069

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