Tetrathioethylenes oxidation potentials

Other conditions being equal, the first oxidation potentials of tetrathiofulvalenes are usually less positive than those of tetrathioethylenes [141-151]. The first reversible oxidation of tetrathiofulvalenes normally occurs at 0.2-0.8 V versus SCE, whereas the second occurs at 0.6-1.2V... 

Table 4 Oxidation Potentials for Some Tetrathioethylenes (L) in MeCN...

Disproportionation constants, Aidisp, have been measured from oxidation potentials in acetonitrile and other solvents for the thianthrene, 4,4,-dimethoxybiphenyl, and 9,10-di-p-anisylanthracene cation radicals (Hammerich and Parker, 1973). In acetonitrile they are, respectively, 2 3 x 10-9, 2-7 x 10-5 and 1-9 x 10-4, indicating that these cation radicals, like the violenes have a very small tendency toward disproportionation. 7sfdiSp f°r thianthrene cation radical (l.xl0-9) and the tetrathioethylene cation radical (5xl0-8) have been measured in molten aluminum chloride-sodium chloride at 140° (Fung et al., 1973). 

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See also in sourсe #XX -- [ ]

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