• J L Vilchez

      Articles written in Journal of Chemical Sciences

    • Mechanism of 1-phenylazo-2-naphthol-3,6-disulphonic acid reduction on a mercury electrode

      F Capitan A Guiraum J L Vilchez J M Bosque

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      The reduction of 1-phenylazo-2-naphthol-3,6-disulphonic acid (disodium salt) at the dropping mercury electrode has been investigated. The reduction takes place in a two-electron step. The process is diffusion controlled. The reagent captures two electrons and one or two hydrogen ions depending on whether the pH is higher or lower than 7, producing 1-phenylhydrazo-2-naphthol-3,6-disulphonic acid, in both cases. A disproportionation reaction of the hydrazo compound takes place, and amines are the final reduction products. The reaction orders, together with Tafel’s slopes have been calculated.

    • Electrochemical reduction of diazepam

      L Thomas J L Vilchez G Crovetto J Thomas

      More Details Abstract Fulltext PDF

      The reduction of 7-chloro-1,3-dihydro-1-methyl-5-phenyl-2H-1,4-benzodiazepine-2-one at the dropping mercury electrode has been investigated. The process is diffusion controlled; furthermore, the reduction wave enables the quantitative determination of the drug both in acid and basic media. The reagent captures two electrons and two hydrogen ions. A disproportionation reaction of the hydrazo-compound takes place, and amines are the final reduction products.

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