Dication salt of bis(ethylenedithio)tetrathiafulvalene: preparation and crystal structure of BEDT-TTF(ClO4)2

Abstract
Electrocrystallization of bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) in an oxidizing solvent medium yields BEDT-TTF (ClO4)2, which is the first example of a salt in which BEDT-TTF is present only as the dication; bond length data from an X-ray structure determination of BEDT-TTF(ClO4)2 are used as a standard for assigning the +2 oxidation state to BEDT-TTF molecules in mixed-valent cation-radical salts.

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