4-[(5-Hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)phenylmethyl]-5-methyl-2-phenyl-1H-pyrazol-3(2H)-one ethanol hemisolvate

The asymmetric unit of the title compound, C(27)H(24)N(4)O(2)center dot-0.5C(2)H(6)O, comprises two crystallographically independent molecules (A and B) with slightly different conformations, and one ethanol molecule of crystallization. Intramolecular C-H center dot center dot center dot O and O-H center dot center dot center dot O hydrogen bonds generate six- and eight-membered rings, producing S(6) and S(8) ring motifs, respectively. In molecule A, one of the benzene rings is disordered over two positions, with site-occupancy factors of 0.542 (11) and 0.458 (11). The dihedral angles between the central benzene ring and the two outer benzene rings are 73.88 (9) and 82.6 (2)/88.9 (2)degrees in molecule A, and 80.81 (8) and 79.38 (8)degrees in molecule B. In the crystal structure, molecules form infinite one-dimensional chains in the (101) plane. The crystal structure is stabilized by intermolecular O-H center dot center dot center dot N,N-H center dot center dot center dot N, N-H center dot center dot center dot O and C-H center dot center dot center dot O hydrogen bonds, weak C-H center dot center dot center dot pi and pi-pi [centroid-centroid = 3.5496 (1) angstrom] interactions.