Synthesis and crystal structure of N-(4-chloro­phen­yl)-5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidin-2-amine

The title compound, C(13)H(12)ClN(5), was synthesized by the cyclization of 1-(4,6-di­methyl­pyrimidin-2-yl)-4-phenyl­thio­semicarbazide in the presence of Ni(NO(3))(2). The mol­ecular structure of the compound is essentially planar. In the crystal, mol­ecules form dimers via pairs 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 inter­actions between the aromatic systems of the pyrimidine and benzene nuclei, and between the triazole cores.