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Acta Cryst. (2013). E69, o1333  [ doi:10.1107/S1600536813019892 ]

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

B. C. Manjunath, S. Madan Kumar, A. C. Vinayaka, S. Jayasheelan, M. P. Sadashiva and N. K. Lokanath

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, [pi]-[pi] interactions occur between nitrophenyl groups [minimum centroid-centroid distance 3.940 (2) Å], stacking the molecules along the ac plane.

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