2,2′-Dichloro-1,1′-[(butane-1,4-diyldi­oxy)bis­(nitrilo­methyl­idyne)]dibenzene

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 π–π 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—H⋯O hydrogen-bonding inter­actions.