title: N,N'-Bis[(E)-4-nitro-benzyl-idene]-4,4'-oxydianiline.
abstract: The title compound, C(26)H(18)N(4)O(5), can be regarded as an extended ether with two terminal nitro groups. The two aryl rings bonded to the central O atom form a dihedral angle of 75.72 (6)°, and the terminal nitro groups are slightly twisted [by 6.4 (2) and 3.3 (3)°] from the benzene rings to which they are attached. The crystal packing exhibits weak inter-molecular C-H⋯O hydrogen bonds and π-π inter-actions [centroid-centroid distances = 3.794 (3) Å].
authors.affiliation: Department of Chemistry (BK21), Sungkyunkwan University, Natural Science Campus, Suwon 440-746, Republic of Korea.
authors.forename: Hee K
authors.initials: HK
authors.lastname: Lee
authors.forename: Soon W
authors.initials: SW
authors.lastname: Lee