title: 5H-1-Benzothio-pyrano[2,3-b]pyridin-5-one.
abstract: Mol-ecules of the title compound, C(12)H(7)NOS, with one half-mol-ecule in the asymmetric unit, are disordered about a crystallographic centre of inversion. Refinement showed that the C=O group is disordered with the S atom and the N atom is disordered over four positions. Adjacent mol-ecules are connected through C-H⋯O hydrogen bonds and π⋯π inter-actions (centroid-centroid distances of 3.635 and 3.858 Å).
authors.forename: Muhammad Naeem
authors.initials: MN
authors.lastname: Khan
authors.forename: M Nawaz
authors.initials: MN
authors.lastname: Tahir
authors.forename: Misbahul Ain
authors.initials: MA
authors.lastname: Khan
authors.forename: Islam Ullah
authors.initials: IU
authors.lastname: Khan
authors.forename: Muhammad Nadeem
authors.initials: MN
authors.lastname: Arshad