Sulfur cathodes, sacrificial

The triple bond of the cyano group in benzonitrile is also affected by Sx anions thiobenzamide was formed in this case in a 40% yield [255,256]. An interesting example of a simultaneous introduction of both sulfur and carbon using a sacrificial carbon-sulfur cathode is the formation of 4-morpholino-a-thioxoethaneditioate from morpholine [264]. 

Although it does not deal with the direct redox processes of sulfur organic compounds, the use of sacrificial electrodes, both cathodes and anodes producing... 

A convenient arrangement of a sacrificial selenium cathode is the tea bag method, in which a graphite cloth bag is filled with selenium pearls [143]. Other forms of sulfur or selenium electrodes have been described [144]. 

Most macroscale experiments run with C/S sacrificial cathode were conducted at a potential of —0.9 V (vs. SCE). Obviously, transients species coming from the fragmentation of sulfur (radical ions or anions) can act as reducing species and nucleophiles. Very often, it appeared difficult to discriminate between different chemical (and electrochemical) pathways. Preliminary experiments based on the nucleophilicity of reduced products of dissolved sulfur led with poor selectivity to dipropionitrile sulfide (Tomilov [285]) and to alkyl polysulfides (Paris [286]). 

In this relatively new synthetic pathway the sulfur, which is electro active, is incorporated in a carbon electrode and used as a sacrificial cathode to yield S3 , Ss and 84 [60, 61]. In an upgraded way the cyanomethyl anion ( CH2CN) is... 

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