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Kinetics and mechanism of the reduction of diaquatetrakis (2,2′-bipyridine)-μ-oxo diruthenium(III) by ascorbic acid

✍ Scribed by J. Femi Iyun; G. Adefikayo Ayoko; Habiba M. Lawal

Publisher
Springer
Year
1995
Tongue
English
Weight
310 KB
Volume
20
Category
Article
ISSN
0340-4285

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✦ Synopsis

The kinetics of the oxidation of ascorbic acid by diaquatetrakis (2,2'-bipyridine)-p-oxo diruthenium(III) in aqueous HC104 were investigated. The dependence of the second order rate constant k2 on [H +] is given by k2 = a + b[H+] -1, indicating that both the undissociated form and the monoanion of ascorbic acid are reactive. Marcus theory was used to estimate the redox potential for the Rum--O--Rum/Rum--O--Ru n couple and a feasible mechanism has been proposed to explain the results.

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