7,7-Dimethyl-2-phenyl-6,7-dihydro-1,2,4-triazolo[1,5-a][1,3,5]triazin-5-amine

The title compound, C12H14N6, was synthesized via cyclo-condensation of 5-guanidino-3-phenyl-1,2,4-triazole with acetone. Only one tautomeric form with the NH H atom vicinal to the methyl groups was observed in the crystal structure. The triazine ring adopts a flattened half-boat conformation. The dihedral angle between the triazole and phenyl rings is 9.99 ( 5)degrees. The crystal packing is stabilized by intermolecular N-H center dot center dot center dot N hydrogen bonds which link the molecules into a chain along the a axis.