1,2-Diphenyl-2-[4-(4-pyridyl)benzylidenehydrazono]ethan-1-one

Abstract

In the title compound, C26H19N3O, the dimethylene hydrazine (—C=N—N=C—) unit is approximately planar, the torsion angle around the N—N bond being 162.2 (6)°. The phenyl and benzoylphenyl rings at one end of the hydrazine unit are aligned at angles of 9.5 (5) and 88.5 (4)°, respectively, with respect to the hydrazine unit, whereas the benzene ring at the other end is twisted by an angle of 14.4 (4)°. In the crystal structure, molecules are linked into centrosymmetric dimers by intermolecular C—H...O hydrogen bonds. The monoclinic crystal under investigation shows pseudo-merohedral twinning with twin fractions of 0.63 and 0.37.