Abstract
Optimum conditions for electrosynthesis of nitrosobenzenes bearing in meta or para position electron withdrawing groups (, , , , ) were found using dc polarography, cyclic voltammetry, and the recording of current‐voltage curves using mercury and carbon electrodes. Electroreduction was best carried out in an acetate buffer pH 5.7 containing 20 to 40% dimethylformamide using a porous carbon electrode. This was followed by electro‐oxidation on an anode of a similar composition in the same solution. Two consecutive batch electrolyses are possible, but yields with a flow‐through cell were better due to a smaller effect of consecutive condensations, yielding azoxy or azomethine compounds. At pH 5.7, which was used in this study, the rates of these competitive processes were lowest.
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