title: 2-Methyl-sulfanyl-1,2,4-triazolo[1,5-a]quinazoline-5(4H)-thione.
abstract: In the title compound, C10H8N4S2, comprising fused six-, six- and five-membered rings, the mol-ecule is close to being planar (r.m.s. deviation of the non-H atoms = 0.041 Å). The S-bound methyl group is folded away from the single N atom of the triazole ring and the NH group of the six-membered ring, allowing for the formation of centrosymmetric eight-membered {⋯HNCN}2 synthons in the crystal. The resulting inversion dimers are connected into supra-molecular stacks aligned along the b-axis direction by π-π inter-actions [centroid-centroid distances = 3.6531 (12) and 3.7182 (12) Å].
authors.affiliation: Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia.
authors.forename: Rashad
authors.initials: R
authors.lastname: Al-Salahi
authors.forename: Mohamed
authors.initials: M
authors.lastname: Marzouk
authors.forename: Mohamed A
authors.initials: MA
authors.lastname: Al-Omar
authors.forename: Abd El-Galil E
authors.initials: Ael-G
authors.lastname: Amr
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng
authors.forename: Edward R T
authors.initials: ER
authors.lastname: Tiekink