Bis(diphenylphosphorothioyl) trisulfide

In the title compound, C24H20P2S5, the P atoms are arranged trans with respect to the S-3 group and the S = P-S-S systems have cisoid geometry, with an average S-P-S-S torsion angle of -56.7 degrees. The dihedral angles between the two phenyl rings attached to the P atoms are 87.33 (12) and 75.67 (10)degrees. In the crystal structure, the molecules are linked into chains running parallel to the a axis by weak intermolecular C H H center dot center dot center dot S hydrogen bonds. Centrosymmetrically related chains are further connected by pi-pi stacking interactions, with a centroid-to-centroid distance of 3.795 (5) angstrom.