Experimental Crystal data

R factor = 0.025; wR factor = 0.067; data-to-parameter ratio = 13.8. The piperidone ring in the title compound, C18H19NOS2, is in a distorted half-chair conformation, distorted towards a twisted boat, with the central methylene C atom of the propyl backbone lying 0.606 (2) A ̊ out of the plane defined by the other five atoms (r.m.s. deviation = 0.1197 Å). One of the S-bound phenyl rings is almost perpendicular to the least-squares plane through the piperidone ring, whereas the other is splayed [dihedral angles = 75.97 (6) and 44.21 (7), respectively]. The most prominent feature of the crystal packing is the formation of helical supramolecular chains along the b axis sustained by C—H O interactions. The chains are consolidated into a three-dimensional architecture via C—H interactions whereby one S-bound phenyl ring accepts two C—H contacts. Related literature For background to -thio-carbonyl compounds, see: Vinhato et al. (2011); Olivato et al. (2009). For related structures, see: Zukerman-Schpector et al. (2010, 2011). For ring conforma-tional analysis, see: Cremer & Pople (1975). For the synthesis