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Kinetics of oxidation of a 2-aminomethylpyridinechromium(III) complex by periodate

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Abstract

The oxidation kinetics of the 2-aminomethylpyridineCrIII complex with periodate in aqueous solution were studied and found to obey the rate law:Rate = [CrIII]T [IO4 -]{k1K2 + k2 K1 K3/[H+]}/{1+K1/[H+] + k2[IO4 -]+K1K3/[H+][IO4 -]} where K 1, K 2 and K 3 are the deprotonation of [Cr(L)2(H2O)]3+ and pre-equilibrium formation constants for [(L)2—Cr—OIO3]2+ and [(L)2—Cr—OH—OIO3]+ precursor complexes respectively. An inner-sphere mechanism was proposed. The effect of Cu2+ on the oxidation rate was studied over the (1.0–9.0) × 10−5 mol dm−3 range. The reaction rate was found to be inversely proportional to the Cu2+ concentration over the range studied.

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  1. Chemistry Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia

    Alaa-El-Din M. Abdel-Hady

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  1. Alaa-El-Din M. Abdel-Hady
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Abdel-Hady, AED.M. Kinetics of oxidation of a 2-aminomethylpyridinechromium(III) complex by periodate. Transition Metal Chemistry 25, 437–442 (2000). https://doi.org/10.1023/A:1007019528319

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