Key indicators: single-crystal X-ray study; T = 298 K; mean (C-C) = 0.006 Å; R factor = 0.075; wR factor = 0.164; data-to-parameter ratio = 14.0.The molecule of the title compound, C 18 H 18 Cl 2 N 2 O 2 , lies across a crystallographic inversion centre and adopts an E configuration with respect to the azomethine C N bond. The imino group is coplanar with the aromatic ring. Within the molecule, the planar units are parallel, but extend in opposite directions from the dimethylene bridge. In the crystal structure, the title compound exhibits a layer packing structure via weak -stacking interactions [intermolecular plane-to-plane distances between adjacent aromatic rings are 3.461 (3) Å ]. Molecules in each layer are linked by intermolecular C-HÁ Á ÁO hydrogen-bonding interactions.
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The title compound, C17H16Cl2N2O2, assumes a V-shape configuration with a dihedral angle between the two halves of the molecule of 79.60 (4)°. The asymmetric unit comprises one half-molecule with a crystallographic twofold rotation axis passing through the central C atom. There are weak intermolecular π–π stacking interactions between neighbouring benzene rings with intermolecular plane-to-plane distances of 3.277 (6) and 3.465 (5) Å along the a and c axes, respectively. In the crystal structure, weak intermolecular C—H⋯O bonds link each molecule to four others to form an infinite three-dimensional network.
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