Collect. Czech. Chem. Commun. 1993, 58, 41-46

Electroreduction of Aromatic Nitro Compounds: Case for Comparison of Information Obtained by Polarography and Voltammetry

Petr Zuman

Department of Chemistry, Clarkson University, Potsdam, New York 13699-5810, U.S.A.


The difference between the information obtained by d.c. polarography (which is virtually a potentiostatic method) and cyclic voltammetry (CV), where products formed at one potential can affect electrolysis at another potential is discussed. The principle is demonstrated on reduction of nitrobenzenes, where at DME the reduction usually occurs as a strictly four-electron process, whereas in CV the arylhydroxylamines formed react wit an intermediate of the four-electron reduction.