10H-Phenothiazine 5-oxide

Abstract

In the title compound, C12H9NOS, the sulfoxide O atom is disordered over two sites with occupancies of 0.907 (4) and 0.093 (4). The dihedral angle betweeen the two aromatic rings is 18.40 (14)°. Different types of supramolecular interactions including intermolecular N—H...O hydrogen bonds and π–π contacts [centroid–centroid distances = 3.9096 (16) and 4.1423 (16) Å] between the aromatic rings of symmetry-related molecules are observed in the crystal structure.