Kinetics and mechanism of oxidation of ascorbic acid by manganese(III) in aqueous acidic perchlorate media
- 1 January 1978
- journal article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 1,p. 61-63
- https://doi.org/10.1039/dt9780000061
Abstract
The kinetics and mechanism of oxidation of ascorbic acid (H2A) by MnIII in aqueous acidic perchlorate media have been investigated by means of stopped-flow spectrophotometry. The rate law is of the form –½d[MnIII]/dt=(ka+kb[H+]–1)[MnIII][H2A] where the two terms have been assigned to reactions involving the undissociated form of ascorbic acid with Mn3+(aq) and [Mn(OH)]2+(aq) respectively. Comparison with similar reactions involving benzenediols suggests some conclusions on the reduction potentials and the oxidation mechanism of ascorbic acid.Keywords
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