Kinetic and spectroscopic studies with a rapid-scanning spectrometer. Part 2. Intermediates in the one-equivalent metal ion oxidation of phenothiazine and phenoxazine
Abstract
The one-equivalent oxidations of phenothiazine and phenoxazine (Ar2NH) in neutral and acidic CH3CN solution by CeIV and FeIII have been analysed kinetically into the sequence Ar2NH [graphic omitted] Ar2NH˙+ [graphic omitted] Ar2N+→ product and values (or limits) for the relevant rate constants, including those for the oxidant–cation radical reaction, obtained by stopped-flow or rapid-scanning spectrometry. The latter technique has provided u.v.–visible spectra of all the intermediates involved, of which some are described for the first time.
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