3-Pentanone 2,4-dinitrophenylhydrazone

Crystals of the title compound, C11H14N4O4, were obtained from a condensation reaction of 2,4-dinitrophenylhydrazine and 3-pentanone. In the crystal structure, the molecule, except one methyl group, displays a nearly planar structure. The imino group links to the adjacent nitro group via intramolecular hydrogen bonding. The partially overlapped arrangement and face-to-face separation of 3.410 (9) Å between parallel benzene rings indicate the existence of π–π stacking between adjacent molecules. The crystal structure also contains weak intermolecular C—H...O hydrogen bonding.