Studies of unusual oxidation states of transition metals III‐kinetics and mechanism of oxidation of triethanolamine by diperiodatoargenate(III) ion in aqueous alkaline medium
- 1 September 1991
- journal article
- research article
- Published by Wiley in International Journal of Chemical Kinetics
- Vol. 23 (9) , 815-823
- https://doi.org/10.1002/kin.550230908
Abstract
The kinetics of oxidation of triethanolamine (TEA) by diperiodatoargenate(III) anion, [Ag(HIO6)2]5−, has been studied in aqueous alkaline medium by conventional spectrophotometry. The reaction is pseudo‐first‐order in [Ag(III)] disappearance with kobs = (k1 + k2[OH−]) K1K2[TEA]/{[H2IO63−]e + K1 + K1K2[TEA]}, where k1 = 8.05 × 10−3 S−1, k2 = 0.46 M−1 S−1, K1 = 6.15 × 10−4 M, and K2 = 537 M−1 at 25°C, and μ = 0.30 M. Based on the inference that an inner‐sphere complex is formed by indirect replacement of a ligand of [Ag(HIO6)2]5− by a TEA molecule, a reaction mechanism has been proposed. The complex undergoes redox by two modes, both internal and one hydroxide ion assisted.Keywords
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