2 '-(1,3-dithiolan-2-ylidene)-4 '-(1,3-dithiol-2-ylidene)spiro[1,3-dithiole-2,5 '-(4 ' H-5 ',6 '-dihydro-1 ',3 '-dithiapentalene)], the self-condensation product of an extended tetrathiafulvalene derivative

Silica-gel treatment of the extended tetrathiafulvalene derivative 2,3-bis( 1,4-dithiafulven-6-yl)-6,7-dihydrotetrathiafulvalene, bearing two 1, 4-dith iafulven-6-yl groups in vicinal positions, afforded the title compound, C14 H10S8, as a cyclization product. While one dithiafulvenyl group is still co njugated with the tetrathiafulvalene moiety, the other one gives rise to a strongly folded 1,3-dithiole group linked to the molecule through a spiro-C atom. Two short non-bonding intramolecular 1,5-S ... S contacts are also i dentified in the title compound.