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- W1991658900 abstract "The o -nitrobenzyl thiocyanate ( I ) behaves differently on the DME and on a large mercury pool electrode. Polarography did not give a sufficiently clear explanation of the reaction mechanism, only the preparative experiments yielded useful results. Whereas polarographic curves in solutions of Britton-Robinson buffer system with 50% by vol. ethanol exhibit two cathodic waves within the pH region 1-12, corresponding according to their height ratio to an uptake of 4 e and 2 e respectively, the controlled potential preparation electrolysis (CPE) and coulometry results indicate a more complicated reaction path. In the CPE carried out at the concentration of I 1 . 10 -2 mol/l the electroreductive splitting of CH 2 -SCN occurs as the first step. Nitrobenzyl radicals so formed react in the follow-up dimerization resulting in dibenzyl or toluene structures. Simultaneously or at a later stage the completion of the electrolytic reduction of the nitro group proceeds to the hydroxylamino group. In solution of 9 > pH > 1 the CPE of nitro compound I takes place by an ECEC mechanism yielding dibenzodiazocine III , its N-oxide IV and 2,2'-dimethylazoxybenzene ( V ). In course of preparative electrolysis in strongly acidic medium 2-amino-benzo(l,3)-thiazine-l-oxide ( II ) is formed by an EC mechanism." @default.
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- W1991658900 date "1985-01-01" @default.
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- W1991658900 title "Electrolytic reduction of o-nitrobenzyl thiocyanate in buffered solutions on mercury" @default.
- W1991658900 doi "https://doi.org/10.1135/cccc19850033" @default.
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