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Reaction of 2,2′-azinobis (3-ethylbenzothiazoline-6-sulfonic acid (ABTS) derived radicals with hydroperoxides. Kinetics and mechanism

✍ Scribed by C. Aliaga; E. A. Lissi

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
147 KB
Volume
30
Category
Article
ISSN
0538-8066

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✦ Synopsis

Tert-Butyl hydroperoxide and hydrogen peroxide readily react with the radical cation derived from 2,2Ј-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS). The reaction is inhibited by ABTS and protons, and can be interpreted in terms of a mechanism comprising a partially reversible electron transfer

ؒ followed by the self-reactions of the hydroperoxide derived radicals and reactions between them and another ABTS derived radical. A complete kinetic analysis allows an evaluation of the rate constant for reaction (1). A value of was obtained for both compounds.

Ϫ1 Ϫ1

0.2 M s The back reaction of process (1) is more relevant when tert-butyl hydroperoxide is employed.

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