(Z)-2-[(4-Methylphenyl)sulfonyl]-1,2-diphenyletheneselenol

In the title compound, C21H18O2SSe, the dihedral angle between the cis phenyl rings is 64.3 (1)° and those between the toluene and the phenyl rings are 21.1 (2) and 72.0 (1)°, respectively. An intramolecular Se—H...O hydrogen bond occurs. In the crystal, molecules are connected by C—H...O hydrogen bonds and weak C—H...π interactions help to consolidate the crystal packing.