Acta Cryst. (2012). E68, o233 [ doi:10.1107/S1600536811053906 ]
Abstract: In the title compound, C13H10Cl2N2O, the ring N atom and its three attached atoms are essentially coplanar with angles adding to 359.8°, indicating conjugation with the 2-formylacrylonitrile subunit. The aldehyde group is oriented to place the carbonyl O atom 2.02 (3) Å from the N-H hydrogen atom. Intramolecular N-HO and C-HCl interactions occur. The geometry of the exocyclic double bond is Z. In the crystal, weak C-HN hydrogen bonds link the molecules into chains along .
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