Hydrogen‐bonded sheets in ( E )‐2‐nitro­benz­aldehyde 4‐nitro­phenyl­hydrazone and a hydrogen‐bonded framework structure in ( E )‐4‐nitro­benz­aldehyde 4‐nitro­phenyl­hydrazone

Molecules of ( E )‐2‐nitro­benz­aldehyde 4‐nitro­phenyl­hydrazone, C 13 H 10 N 4 O 4 , exhibit a strongly polarized mol­ecular–electronic structure. The mol­ecules are linked into sheets of some complexity, where pairs of hydrogen bonds act co‐operatively to generate two independent substructures, each in the form of a chain of rings. In the isomeric compound ( E )‐4‐nitro­benz­aldehyde 4‐nitro­phenyl­hydrazone, the mol­ecules exhibit orientational disorder; an extensive series of hydrogen bonds links the mol­ecules into a continuous three‐dimensional framework, whose formation is independent of the disorder.