Kinetics of oxidation of hydrogen peroxide by aquocobalt(III) ions in aqueous perchlorate media
- 1 January 1971
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Transactions of the Faraday Society
- Vol. 67, 760-767
- https://doi.org/10.1039/tf9716700760
Abstract
The rapid oxidation of hydrogen peroxide by CoIII has been investigated with initial [CoIII]6 × 10–4 M using stopped-flow spectrophotometry. The oscilloscope traces and the kinetics show that two intermediate complexes related by a protonation equilibrium are involved, and the decomposition of CoIIIHO– 2 dominates over that of CoIIIH2O2. Heats and entropies of formation of the complexes and energies and entropies of activation for their decompositions are calculated : these differ markedly from similar quantities derived from conventional experiments with [CoIII]7 × 10–5 M, and this is discussed in terms of CoIII dimers.Keywords
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