Acta Cryst. (2002). E58, o1098-o1099 [ doi:10.1107/S1600536802016483 ]
Abstract: The molecule of the title compound, C9H9ClN4O4, is nearly planer except for the ortho-nitro group, with the non-H atoms exhibiting an average deviation of 0.099 Å from the mean plane. The ortho-nitro group is nearly perpendicular to the phenyl group, with a dihedral angle of 88.46 (3)°. The N-N and N=C bond lengths of the isopropylidene-hydrazine moiety are 1.3928 (14) and 1.2865 (15) Å, respectively.
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