Kinetics of the oxidation of bromide ions by tris(2,2′-bipyridine)nickel(III) ions in aqueous perchlorate media: comparison with oxidation by aqua-cations
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 15,p. 1502-1504
- https://doi.org/10.1039/dt9770001502
Abstract
The rate of oxidation of bromide ions by [Ni(bipy)3]3+ is first order in [Ni(bipy)3 3+] and first order in [Br–]. The second-order rate constant is independent of acidity in the range 1–5 mol dm–3 HClO4 at a constant ionic strength of 5.00 mol dm–3, and the slow step is a simple interaction of [Ni(bipy)3]3+ with Br– without removal of any co-ordinated 2,2′-bipyridrne from the Ni atom before the electron transfer. Intermediate complexes between the reactants are not detected. This is contrasted with the oxidation of Br– by aqua-cations and is compared with the oxidation of H2O2 by [Ni(bipy)3]3+.Keywords
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