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Ru(III) catalysis in N-bromoacetamide oxidation of ethylene glycol and glycerol: A kinetic and mechanistic study

✍ Scribed by Bharat Singh; Deepika Singh; A. K. Singh

Publisher
John Wiley and Sons
Year
1988
Tongue
English
Weight
432 KB
Volume
20
Category
Article
ISSN
0538-8066

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✦ Synopsis

Kinetics of oxidation of ethylene glycol and glycerol by acidic solution of Nbromoacetamide (NBAI in the presence of ruthenium (111) chloride as a homogeneous catalyst and mercuric acetate as scavenger in the temperature range of 30-50°C have been reported. The reactions follow identical kinetics, being zero-order in substrate and first-order in Ru(II1). First order dependence of the reaction on NBA at its low concentrations tends to zero order in the higher concentration range. Positive effect of [H.1 and [CI I has been observed. A negative effect of acetamide and ionic strength of the medium is observed while D,O and mercuric acetate show zero effect on the reaction velocity.

Various activation parameters have been computed. The main product of the oxidation is corresponding acid. (H20Br)' has been postulated as the oxidizing species. A suitable mechanism in conformity with the kinetic data has been proposed.

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