A. Salmerón-valverde, S. Bernès
Mar 3, 2012
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Journal
Acta Crystallographica Section E: Structure Reports Online
Abstract
The title compound, C16H8N2·C6H4S4, crystallizes with the fluorene derivative placed in a general position and two half tetrathiafulvalene (TTF) molecules, each completed to a whole molecule through an inversion center. The fluorene ring system is virtually planar (r.m.s. deviation from the mean plane = 0.027 Å) and the dicyano group is twisted from the fluorene plane by only 3.85 (12)°. The TTF molecules are also planar, and their central C=C bond lengths [1.351 (8) and 1.324 (7) Å] compare well with the same bond length in neutral TTF (ca 1.35 Å). These features indicate that no charge transfer occurs between molecules in the crystal; the compound should thus be considered a cocrystal rather than an organic complex. This is confirmed by the crystal structure, in which no significant stacking interactions are observed between molecules.