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Electrochemical and spectroscopic studies of the oxidation mechanism of the herbicide propanil
Orientador(es)
Resumo(s)
Electrochemical oxidation of propanil in deuterated solutions was studied by cyclic, differential pulse,
and square wave voltammetry using a glassy carbon microelectrode. The oxidation of propanil in
deuterated acid solutions occurs at the nitrogen atom of the amide at a potential of +1.15 V vs Ag/
AgCl. It was also found that, under the experimental conditions used, protonation at the oxygen atom
of propanil occurs, leading to the appearance of another species in solution which oxidizes at +0.60
V. The anodic peak found at +0.79 V vs Ag/AgCl in deuterated basic solutions is related to the
presence of an anionic species in which a negative charge is on the nitrogen atom. The electrochemical
data were confirmed by the identification of all the species formed in acidic and basic deuterated
solutions by means of NMR spectroscopy. The results are supported by electrochemical and
spectroscopic studies of acetanilide in deuterated solutions.
Descrição
Palavras-chave
Herbicides Propanil Acetanilide Deuterated solutions Oxidation mechanism Electrochemistry Spectroscopy Nuclear magnetic resonance
Contexto Educativo
Citação
Editora
American Chemical Society