Acta Cryst. (2005). E61, o2065-o2067  [ doi:10.1107/S1600536805017617 ]

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

M. Odabasoglu, O. Özdamar and O. Büyükgüngör

Abstract: The title compound, C₁₂H₁₂N₃O₅, adopts a keto-hydrazo tautomeric form stabilized by intramolecular hydrogen bonds. The aromatic ring and aliphatic chain, which adopt a trans configuration about the C=N double bond, are nearly coplanar, with a dihedral angle of 7.56  (1)° between them. The molecules pack via weak intermolecular C-HO hydrogen bonds which, together with intramolecular N-HO bonds, form an S(6)S(6)[R₂²(13)]S(6)S(6) motif.

Online 10 June 2005

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