title: Synthesis and crystal structure ofN-(4-chloro-phen-yl)-5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidin-2-amine.
abstract: The title compound, C13H12ClN5, was synthesized by the cyclization of 1-(4,6-di-methyl-pyrimidin-2-yl)-4-phenyl-thio-semicarbazide in the presence of Ni(NO3)2. The mol-ecular structure of the compound is essentially planar. In the crystal, mol-ecules form dimersviapairs of N-H⋯N hydrogen bonds between the H atom of the exocyclic amino group and the N atom at the 4-position of the triazole ring. The resulting dimers are packed into layers which are connected by π-stacking inter-actions between the aromatic systems of the pyrimidine and benzene nuclei, and between the triazole cores.
authors.affiliation: Vernadsky Institute of General and Inorganic Chemistry of the Ukrainian National Academy of Sciences, Palladin av. 32/34, 03142 Kyiv, Ukraine.
authors.forename: Hlib
authors.initials: H
authors.lastname: Repich
authors.affiliation: Vernadsky Institute of General and Inorganic Chemistry of the Ukrainian National Academy of Sciences, Palladin av. 32/34, 03142 Kyiv, Ukraine.
authors.forename: Svitlana
authors.initials: S
authors.lastname: Orysyk
authors.affiliation: The Institute of Molecular Biology and Genetics of the Ukrainian National Academy of Sciences, Zabolotnogo Str. 150, 03680 Kyiv, Ukraine.
authors.forename: Pavlo
authors.initials: P
authors.lastname: Savytskyi
authors.affiliation: Vernadsky Institute of General and Inorganic Chemistry of the Ukrainian National Academy of Sciences, Palladin av. 32/34, 03142 Kyiv, Ukraine.
authors.forename: Vasyl
authors.initials: V
authors.lastname: Pekhnyo
keywords: Dimroth rearrangement; crystal structure; thio­semicarbazide cyclization; triazolo­pyrimidines