title: N,N'-Bis(2,5-dichloro-phen-yl)isophthalamide.
abstract: The asymmetric unit of the title compound, C(20)H(12)Cl(4)N(2)O(2), contains one half-mol-ecule with a center of symmetry along a C⋯C axis of the central benzene ring. The two C=O groups adopt an anti orientation and the two amide groups are twisted away from the central benzene ring by 27.38 (3) and 27.62 (4)°. The mean planes of the dichloro-substituted benzene rings are twisted by 7.95 (4)° with respect to the benzene ring. The crystal packing is stabilized by weak inter-molecular N-H⋯O inter-actions.
authors: Department of Chemistry, Taiyuan Normal University, Taiyuan 030031,  People's Republic of China.
authors: Ruitao
authors: R
authors: Zhu
authors: Jinlong
authors: J
authors: Dong
authors: Yu
authors: Y
authors: Zuo
authors: Yuehong
authors: Y
authors: Ren