4-{[3,4-Dihydro-5-methyl-3-oxo-2-phenyl-2H-pyrazol-4-ylidene](phenyl)methylamino}-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one

Abstract

In the title compound, C28H25N5O2, the carbonyl group of the 5-methyl-2-phenyl­pyrazol-3-one moiety, the adjacent double bond and the amine N atom of antipyrine are essentially coplanar, the largest deviation from the mean plane being 0.049 (2) Å. The compound is a neutral tridentate ligand in an en­amine–keto tautomeric form, due to a strong intramolecular N—H⋯O hydrogen bond. The dihedral angle between the two pyrazolone rings is 86.2 (3)°, reducing steric hindrance.