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Kinetic and mechanism of the oxidation of chromium(III) complex with anthranil-N,N-diacetic acid by periodate ion in acidic aqueous solutions

  • Chemical Kinetics and Catalysis
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Abstract

The kinetics of oxidation of [CrIII(atda)(H2O)2] (atda = anthranil-N,N-diacetato) complex by IO −4 was studied spectrophotometrically in aqueous solutions with pH range 2.20–3.34, 0.30 M ionic strength and in 20.0–40.0°C temperature range. The rate law of the reaction exhibited saturation kinetics. Values of the rate constant for the electron transfer process, the equilibrium constant for dissociation of [CrIII (atda)(H2O)2] to [CrIII (atda) (H2O)OH]+ + H+ and the pre-equilibrium formation constant were calculated. The thermodynamic activation parameters are reported. It is proposed that electron transfer proceeds through an inner-sphere mechanism via coordination of the IVII to chromium(III).

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Authors and Affiliations

  1. Department of Chemistry, College of Science, King Khalid University, P. O. Box 9004, Abha, Saudi Arabia

    Ismat H. Ali

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  1. Ismat H. Ali
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Ali, I.H. Kinetic and mechanism of the oxidation of chromium(III) complex with anthranil-N,N-diacetic acid by periodate ion in acidic aqueous solutions. Russ. J. Phys. Chem. 89, 987–992 (2015). https://doi.org/10.1134/S0036024415060138

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  • DOI: https://doi.org/10.1134/S0036024415060138

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