In the title compound, C17H10S5, the dithiine ring adopts a boat conformati
on while the dithiole ring has an envelope conformation. The phenyl groups
are planar and make dihedral angles of 40.7 (2) and 59.8 (2)degrees with th
e best plane of the thiine ring. The shortest intermolecular S . . .S conta
ct is 3.305 (2) Angstrom.