Acta Cryst. (2005). E61, o2068-o2070  [ doi:10.1107/S1600536805017629 ]

Ethyl 4-chloro-2-[(4-nitrophenyl)hydrazono]-3-oxobutyrate

M. Odabasoglu, O. Özdamar and O. Büyükgüngör

Abstract: The title compound, C₁₂H₁₂N₃O₅, adopts a keto-hydrazo tautomeric form stabilized by an intramolecular hydrogen bond. The aromatic ring and aliphatic chain, which adopt a trans configuration about the N-N bond, are nearly coplanar, with a dihedral angle of 18.30  (6)° between them. The molecules pack via weak intermolecular C-HO hydrogen bonds which, together with an intramolecular N-HO bond, form an S(6)C(13) motif. The structure is further stabilized by C-H and - interactions.

Online 10 June 2005

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