Abstract
The title Schiff base compound, C23H23N5O, was synthesized by the reaction of 4-aminophenazone and 3,5-dimethyl-1-phenylpyrazole-4-carbaxaldehyde. The molecule adopts an E configuration about the central C=N double bond. A weak intramolecular C-H center dot center dot center dot O hydrogen bond generates an S(6) ring motif. The dihedral angle between the pyrazole rings is 24.72 (10)degrees and the dihedral angles between the pyrazole rings and the adjacent phenyl rings are 58.67 (10) and 46.58 (11)degrees. The crystal structure is stabilized by weak C-H center dot center dot center dot pi interactions involving the pyrazolone and phenyl rings.