Experimental Crystal data

disorder in main residue; R factor = 0.050; wR factor = 0.152; data-to-parameter ratio = 12.5. In the title compound, C14H15N3O2, the phenylene ring is disordered over two orientations. As a result, the almost planar pyrazole ring (r.m.s. deviation = 0.004 Å) forms dihedral angles of 59.8 (1) and 61.9 (1) with the two orientations of the phenylene ring. The dihedral angle between the two orientations is 59.2 (1). In the crystal, inversion dimers lined by pairs of N—H O hydrogen bonds occur; there is also an intramolecular N—H O bond. Related literature For the synthesis of the title compound, see: Ibrahim et al