title: 10-Acetyl-10H-phenothia-zine 5-oxide.
abstract: In the title compound, C(14)H(11)NO(2)S, the sulfoxide O atom is disordered over two sites with occupancies of 0.886 (4) and 0.114 (4), reflecting a partial inversion of the lone pair at the tetra-hedral S-atom site. In the crystal, a supra-molecular arrangement arises from weak inter-molecular C-H⋯O hydrogen bonds. π-π contacts between the aromatic rings of symmetry-related mol-ecules [centroid-centroid distances = 3.7547 (15) and 3.9577 (15) Å] in parallel accumulation further stabilize the crystal structure.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Wang
authors.forename: Lei
authors.initials: L
authors.lastname: Yang
authors.forename: Zhouqing
authors.initials: Z
authors.lastname: Xu
authors.forename: Yanchun
authors.initials: Y
authors.lastname: Sun