2-r-(4-Chlorophenyl)-6-c-phenyl-3,4,5,6-tetrahydro-2H-thiopyran-4-one 1-oxide

The thiopyran unit of the title molecule, C17H15ClO2S, is in chair form. A crystallographic mirror plane bisects the molecule, passing through the O=S and the opposite C=O atoms of the central ring, with statistical disorder of the Cl atom. The geometry around the S atom is tetrahedral and the carbonyl C is planar. The 4-chlorophenyl group at the 2 position and the phenyl ring at the 6 position have equatorial orientations. Intermolecular C-H...O and C-H...Cl hydrogen bonds are found in the crystal structure. In addition, there is a short O...C intermolecular contact [2.970 (5) Å].