7-Amino-5-methyl-2-phenyl-6-(phenyldiazenyl)pyrazolo[1,5-a]pyrimidine crystallizes with Z′ = 2: pseudosymmetry and the formation of complex sheets built from N-H...N and C-H...π(arene) hydrogen bonds

The title compound, C19H16N6, crystallizes with Z′ = 2 in the space group P21/n. The two molecules in the selected asymmetric unit are approximate mirror images of one another; most corresponding pairs of atoms are related by an approximate half‐cell translation along [100]. Each molecule contains an intramolecular N—H...N hydrogen bond and the molecules are linked into complex sheets by a combination of two intermolecular N—H...N and four C—H...π(arene) hydrogen bonds. Comparisons are made with some other 7‐aminopyrazolo[1,5‐a]pyrimidines.