(Z)-Ethyl 2-[2-(4-Acetylphenyl)Hydrazono]4-Chloro-3-Oxobutanoate

Abstract

The title compound, C14H15ClN2O4, adopts a keto-hydrazo tautomeric form stabilized by an intra-molecular N - H⋯O hydrogen bond. The configuration around the N - N bond is trans. The dihedral angle between the aromatic ring and the plane of the aliphatic chain attached to the hydrazone group is 10.5 (1)°. In the solid state, mol-ecules exist as centrosymmetrically related C - H⋯O hydrogen-bonded R 2 2(24) dimers. © 2007 International Union of Crystallography. All rights reserved.