N,N'-Bis(4-nitro-phen-yl)biphenyl-2,2'-dicarboxamide.

In the title compound, C(26)H(18)N(4)O(6), the amide units are approximately coplanar with the benzene ring bonded to the N atom [dihedral angles of 10.59†(10) and 24.00†(12)°], but twisted significantly out of the plane of the benzene ring bonded to the carbonyl C atom [dihedral angles of 57.82†(9) and 58.05†(9)°]. The dihedral angle between the two rings of the biphenyl unit is 77.66†(4)°. Intra-molecular N-H⋯O hydrogen bonds and weak C-H⋯O inter-actions occur. The crystal structure is stabilized by inter-molecular N-H⋯O hydrogen bonds and C-H⋯O contacts.