Cathodic behaviour of some 5-nitrophenyl-1,2-dithiole-3-thiones and 5-nitrophenyl-1,2-dithiole-3-ones

Add time:08/19/2019    Source:sciencedirect.com

The electrochemical behaviour of 5-(nitrophenyl)-1,2-dithiole-3-thiones and 5-(nitrophenyl)-1,2-dithiole-3-ones was studied by cyclic voltammetry in DMF. The standard reduction potentials of 5-(p-nitrophenyl)-dithiolethione and 5-(p-nitrophenyl)-dithiolone entered into a linear correlation involving standard reduction potentials of substituted nitrobenzenes and known electronic constants of several substituents. This correlation allowed the determination of the electronic effects of [3-thioxo-1,2-dithiole]-5-yl and [3-oxo-1,2-diothiole]-5-yl groups which were, respectively, σp−=1.14 and σp−=0.86, comparable with those of nitro or cyano substituents.

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