Synthesis and crystal structure of -(4-chloro-phen-yl)-5,7-dimethyl-1,2,4-triazolo[1,5-]pyrimidin-2-amine.

The title compound, CHClN, was synthesized by the cyclization of 1-(4,6-di-methyl-pyrimidin-2-yl)-4-phenyl-thio-semicarbazide in the presence of Ni(NO). The mol-ecular structure of the compound is essentially planar. In the crystal, mol-ecules form dimers 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.