title: Crystal structure ofrac-2,3-diphenyl-2,3,5,6-tetrahydro-4H-1,3-thiazin-4-one 1-oxide.
abstract: In the title compound, C16H15NO2S [alternative name:rac-2,3-diphenyl-1,3-thia-zinan-4-one 1-oxide], the thia-zine ring exhibits an envelope conformation, with the S atom forming the flap. The sulfoxide O atom is in a pseudo-axial position on the thia-zine ring and istransto the phenyl group on C-2. The phenyl rings form a dihedral angle of 89.47 (19)°. In this racemate crystal, homochiral mol-ecules form slabs parallel to (010) of thicknessb/2 which then stack with alternating chirality in theb-axis direction. The stacking is aided by edge-to-face inter-actions between the phenyl rings of racemic mol-ecules. Within each of the single-enanti-omer slabs, the mol-ecules are held by C-H⋯O-type inter-actions, with an H⋯O distance of 2.30 Å, forming infinite chains along thec-axis direction, as well by the edge-to-face inter-actions between phenyl rings of neighboring mol-ecules in thea-axis direction.
authors.affiliation: Department of Biochemistry and Molecular Biology, Pennsylvania State University, University Park, PA 16802, USA.
authors.forename: Hemant P
authors.initials: HP
authors.lastname: Yennawar
authors.affiliation: Pennsylvania State University, Schuylkill Campus, 200 University Drive, Schuylkill Haven, PA 17972, USA.
authors.forename: Ziwei
authors.initials: Z
authors.lastname: Yang
authors.affiliation: Pennsylvania State University, Schuylkill Campus, 200 University Drive, Schuylkill Haven, PA 17972, USA.
authors.forename: Lee J
authors.initials: LJ
authors.lastname: Silverberg
keywords: crystal structure; envelope pucker; thia­zine compound