title: 7H-[1,2]Benzothia-zolo[3,2-b]quinazoline 5,5-dioxide.
abstract: In the title compound, C(14)H(10)N(2)O(2)S, the benzothia-zole and quinazoline ring systems are essentially planar with maximum deviations of 0.0127 (16) and 0.1588 (15) Å, respectively, and make a dihedral angleof 3.02 (5)°, which shows that the entire mol-ecule is almost planar. The O atoms deviate from the benzothia-zole ring system by 1.2231 (14) and -1.1989 (15) Å. The crystal packing features non-classical C-H⋯O hydrogen bonds and is further consolidated by π-π inter-actions [centroid-centroid distances = 3.7568 (8) and 3.8848 (9) Å].
authors.affiliation: Department of Physics, RKM Vivekananda College (Autonomous), Chennai 600 004,  India.
authors.forename: Ponmudisettu
authors.initials: P
authors.lastname: Narayanan
authors.forename: Subramani
authors.initials: S
authors.lastname: Karthikeyan
authors.forename: Panayancheri Coleppa
authors.initials: PC
authors.lastname: Srinivasan
authors.forename: Krishnan
authors.initials: K
authors.lastname: Sethusankar