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Kinetic study of ruthenium (VI)-catalyzed oxidation of 2-propanol by alkaline hexacyanoferrate (III)

✍ Scribed by A. E. Mucientes; F. J. Poblete; M. A. Rodríguez; F. Santiago

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
101 KB
Volume
12
Category
Article
ISSN
0894-3230

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✦ Synopsis

The kinetics of Ru(VI)-catalyzed oxidation of 2-propanol by hexacyanoferrate(III) was investigated in alkaline media using a spectrophotometric technique. The reaction shows first order in [Ru(VI)], a Michaelis-Menten-type dependence on [2-propanol], a fractional order in [Fe(CN) 3À 6 ] and a complicated variation on [OH À ]. A reaction mechanism which involves two active catalytic species is proposed. Each of these species forms an intermediate complex with the substrate. These complexes decompose slowly, producing ruthenium(IV) complexes, which are reoxidized by hexacyanoferrate(III) in subsequent steps. The theoretical rate law obtained is in complete agreement with all the experimental observations.

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