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Kinetics and mechanism of the iodine oxidation of hydroxylamine

✍ Scribed by Robert T. Wang; Gyula Rábai; Kenneth Kustin

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
405 KB
Volume
24
Category
Article
ISSN
0538-8066

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✦ Synopsis

Studies of the stoichiometry and kinetics of the reaction between hydroxylamine and iodine, previously studied in media below pH 3, have been extended to pH 5.5. The stoichiometry over the pH range 3.4-5.5 is 2NHzOH

and k l , kz, Kp, and KI are (6.5 2 0.6) x lo5 M-' s-', (5.0 2 0.5) s-', 1 x lo6 M-', and 725 M-', respectively. A mechanism taking into account unprotonated hydroxylamine (NHZOH) and molecular iodine (Iz) as reactive species, with intermediates NHzOIz-, HNO, NH20, and 12-, is proposed.

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