N-(2-Hydroxy-3-iodo-5-nitrobenzylidene)-3-nitroaniline: conformational isomers linked into complex sheets by five C-H...O hydrogen bonds and a two-centre iodo-nitro interaction.

The title compound, C(13)H(8)IN(3)O(5), crystallizes with Z' = 2 in the space group P2(1)/n. The two independent molecules, which are both almost planar, are conformational isomers. The molecules are linked into complex sheets by a combination of five independent C-H...O hydrogen bonds and an almost linear two-centre iodo-nitro interaction.