| Summary: | In the title compound, C21H17N3O, the imidazole ring is essentially planar, with a maximum deviation of 0.009 (1) Å. The molecule is disordered over two sites corresponding to a rotation of approximately 180° with a refined occupancy ratio of 0.9180 (14):0.0820 (14). The central pyrimidine ring makes dihedral angles of 5.02 (5), 3.97 (5) and 6.28 (5)°, respectively, with the planes of the imidazole and the terminal phenyl rings for the major component; the values for the minor component are 5.8 (7), 5.0 (6) and 8.5 (6)°, respectively. Part of the observed planarity is accounted for in terms of an intramolecular N—H...O hydrogen bond. In the crystal, molecules of the major component are connected by O—H...N hydrogen bonds, forming supramolecular chains along the c axis.
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