The kinetics of the oxidation of 2,3-dimethylbutane-2,3-diol (pinacol) by aquomanganese(III) ions in aqueous perchlorate media
- 1 January 1971
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 1405-1408
- https://doi.org/10.1039/j19710001405
Abstract
The oxidation of pinacol (2,3-dimethylbutane-2,3-diol) by MnIII in perchlorate media is of the first order in both [MnIII] and [pinacol] at high [pinacol]/[MnIII]. Stopped-flow oscilloscope traces show the presence of intermediate MnIII–pinacol complexes, and the variation of the rate of oxidation with acidity shows that these complexes are Mn3+Me2COH·Me2COHaq and Mn3+Me2COH·Me2COaq –. Overall energies and entropies of activation are determined. This is compared with other cation–pinacol redox reactions.Keywords
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