A mechanistic study on 3-arylazopentane-2,4-diones and some of its derivatives at a hanging mercury drop electrode

摘要

The polarographic reduction of 3-arylazopentane-2,4-diones has been investigated in 40% ethanolic B.R. buffer series (pH 2.6-11.7) at mercury cathode, In all pH values four electrons are involved in the reduction cleavge of N=N center followed by reduction of one of the carbonyl groups present In the examined compounds by two electrons confirmed by controlled potential electrolysis. However, the voltammograms of these compounds display a single irreversible cathodic peak over the entire pH range. The different kinetic parameters of the electron transfer process are evaluated where possible using convolution, deconvolution analysis of the recorded cyclic voltammetric date often combined with digital simulation studies. [References: 25]