ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS, vol.62, 2006 (SCI-Expanded)
The title compound, C13H15ClN2O3, adopts a keto-hydrazo tautomeric form stabilized by an intramolecular N-H center dot center dot center dot O hydrogen bond. The configuration around the N-N bond is trans. The dihedral angle between the aromatic ring and the plane of the C-C-C(=O)-C aliphatic chain is 6.07 (8)degrees.