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Studies of unusual oxidation states of transition metals III-kinetics and mechanism of oxidation of triethanolamine by diperiodatoargenate(III) ion in aqueous alkaline medium

✍ Scribed by Tie-Sheng Shi; Jin-Tian He; Tian-Hui Ding; An-Zhou Wang

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
291 KB
Volume
23
Category
Article
ISSN
0538-8066

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✦ Synopsis

The kinetics of oxidation of triethanolamine (TEA) by diperiodatoargenate(II1) anion, [Ag(HI0,)z]5-, has been studied in aqueous alkaline medium by conventional spectrophotometry. The reaction is pseudo-first-order in [Ag(III)] disappearance with kobs = (kl + &[OH-]) KlKz[TEA]/{[H210:-j+ + K1 + KIKz[TEA]}, where k l = 8.05 x S', kz = 0.46 M -' S 1 , Kl = 6.15 x = 0.30 M. Based on the inference that an inner-sphere complex is formed by indirect replacement of a ligand of [Ag(HIO6)2l5-by a TEA molecule, a reaction mechanism has been proposed. The complex undergoes redox by two modes, both internal and one hydroxide ion assisted.

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