Acta Cryst. (2011). E67, o460  [ doi:10.1107/S1600536811002200 ]

Ethyl 3-oxo-2-(2-phenylhydrazinylidene)butanoate: a re-determination

S. C. Gupta, D. K. Mandal, A. Rani, A. Sahay and S. M. Prasad

Abstract: The previous crystallographic studies [Wang et al. (2005). Huaxue Yanjiu 16, 29-32; Wang et al. (2007). Youji Huaxue, 27, 524] of the title compound, C₁₂H₁₄N₂O₃, gave only the unit-cell dimensions and an R factor with no other details available: the full structure is presented here. The ethoxy group is disordered over two orientations with refined occupancies of 0.642 (15):0.358 (15). The nine C atoms and two N atoms of the 1-phenyl-2-(propan-2-ylidene)hydrazine segment of the molecule are close to being coplanar, with a maximum deviation of 0.0779 (14) Å for the phenylamino N atom and an intramolecular N-HO hydrogen bond generates an S(6) ring. In the crystal, pairs of C-HO hydrogen bonds link molecules into inverson dimers, generating R₂²(16) loops.

Online 22 January 2011

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