Acta Cryst. (2008). E64, o2135  [ doi:10.1107/S1600536808033357 ]

1-(2-Chlorobenzylidene)-2-(2,4-dinitrophenyl)hydrazine

Z.-Q. Shi, N.-N. Ji and X.-Y. Li

Abstract: In the title compound, C₁₃H₉ClN₄O₄, there are two crystallographically independent molecules in the asymmetric unit, which have very similar conformations. The C=N-N angles in each independent molecule are 115.0 (2) and 116.6 (2)°, which are significantly smaller than the ideal value of 120° expected for sp²-hybridized N atoms. This is probably a consequence of repulsion between the nitrogen lone pairs and the adjacent N-N bonds. Two bifurcated intramolecular N-HO hydrogen bonds help to establish the molecular conformation and consolidate the crystal packing.

Online 18 October 2008

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