A triclinic polymorph of (E)-2-(4-isobutylphenyl)-N′-[1-(4-nitrophenyl)ethylidene]propanohydrazide

Abstract

The asymmetric unit of the triclinic polymorph of the title compound, C21H25N3O3, consists of two molecules, whereas for the monoclinic polymorph Z′ = 1 [Fun et al. (2009). Acta Cryst. E65, o445]. The two molecules exhibit an E configuration with respect to the C=N bond. The molecules are linked into dimers by N—H...O and C—H...O hydrogen bonds forming R22(8) ring motifs. In addition, π–π interactions occur between nitrophenyl groups [minimum centroid–centroid distance 3.940 (2) Å], stacking the molecules along the ac plane.