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Kinetics and catalysis of oxidation of phenol by ruthenium(IV)–oxo complex

✍ Scribed by Debabrata Chatterjee; Anannya Mitra

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
436 KB
Volume
282
Category
Article
ISSN
1381-1169

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✦ Synopsis

Kinetics of oxidation of phenol by [Ru IV (tpy)(pic)(O)] + (tpy = 2,2 ,6 ,2 -terpyridine; pic -= picolinate) (1) has been studied in aqueous solution using a rapid scan stopped-flow spectrophotometer. Under pseudo-first order conditions of excess phenol concentrations, the rate of reaction was found to be first order in respect to both 1 and phenol concentrations. Quinones and [Ru II (tpy)(pic)(H 2 O)] + (2) were found to be the ultimate products of the reaction. Kinetic results were analyzed by using global kinetic analysis techniques and a working mechanism in agreement with the rate and activation parameters is presented. The experimental results are discussed in reference to data reported for the phenol oxidation by relevant Ru IV O systems. Catalytic ability of 2 in effecting phenol oxidation in the presence of t-BuOOH has been explored.

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