(E)-5-Phenyl-N′-(1-phenylethylidene)-1H-pyrazole-3-carbohydrazide

In the molecule of the title compound, C18H16N4O, the intramolecular N—H...N hydrogen bond results in the formation of a planar five-membered ring, which is also co-planar with the adjacent five-membered ring, being oriented at a dihedral angle of 1.23 (3)°. The dihedral angles formed by the planar pyrazole ring with the adjacent phenyl ring and the other phenyl ring are 7.29 and 11.21°, respectively. The dihedral angle between the two phenyl rings is 18.07°. In the crystal structure, intermolecular N—H...O hydrogen bonds link the molecules