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.