title: 1-[4-(4-Fluoro-phen-yl)-6-methyl-2-sulfanyl-idene-1,2,3,4-tetra-hydro-pyrimidin-5-yl]ethanone.
abstract: In the title mol-ecule, C(13)H(13)FN(2)OS, the heterocyclic ring adopts a slightly distorted flattened boat conformation, and the plane through the four coplanar atoms makes a dihedral angle of 87.45 (14)° with the benzene ring. The thione, acetyl and methyl groups lie on the opposite side of the heterocyclic mean plane to the fluorophenyl group, which has an axial orientation. N-H⋯O, N-H⋯S, C-H⋯F and C-H⋯O inter-molecular hydrogen bonds and a weak C-H⋯π inter-action involving the benzene ring are found in the crystal structure.
authors.forename: N
authors.initials: N
authors.lastname: Anuradha
authors.forename: A
authors.initials: A
authors.lastname: Thiruvalluvar
authors.forename: S
authors.initials: S
authors.lastname: Chitra
authors.forename: D
authors.initials: D
authors.lastname: Devanathan
authors.forename: R J
authors.initials: RJ
authors.lastname: Butcher