t-3-Isopropyl-1-methyl-r-2,c-6-diphenylpiperidin-4-one thiosemicarbazone.

The piperidine ring in the title compound, C(22)H(28)N(4)S, exhibits a chair conformation. The thiosemicarbazone moiety adopts an extended conformation, and the planar phenyl rings are oriented equatorially with respect to the piperidine ring. Two intermolecular hydrogen bonds involving the S atom form molecular pairs, and the crystal structure is stabilized by weak C-H.pi interactions in addition to van der Waals forces.