title: Identity of a purple dye formed by peroxidic oxidation of p-aminophenol at low pH.
abstract: The structure of a colored intermediate commonly formed in the oxidation of p-aminophenol at low pH is established by analysis of H NMR and UV/vis spectra, kinetics, and molecular modeling, following a new method for synthesizing the dye in high concentrations. The chromogen is shown to consist of two compounds with absorption maxima at 540-560 and 375-385 nm. The 2,6-dimethyl and 3,5-dimethyl analogues of p-aminophenol are found to undergo N- rather than C-substitution under similar conditions.
authors.affiliation: School of Chemical and Physical Sciences, Flinders University, Adelaide 5001, Australia. leonid.lerner@flinders.edu.au
authors.forename: L
authors.initials: L
authors.lastname: Lerner