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Abstract

The asymmetric unit of the title coordination polymer, [Cu(C18H16Br2N2O2)]n, consists of a Schiff base complex in which a crystallographic twofold rotation axis bis­ects the central C—C bonds of the n-butyl spacers of the designated Schiff base ligands, making symmetry-related dimer units, which are twisted around CuII atoms in a bis-bidentate coordination mode. In the crystal, these dimeric units are connected through Cu—O bonds, forming one-dimensional coordination polymers, which propagate along [001]. The CuII atom adopts a square-based pyramidal coordination geometry, being coordinated by two N and two O atoms of symmetry-related ligands and by a third O atom of a neighboring complex. Furthermore, inter­molecular π–π inter­actions [centroid–centroid distance = 3.786 (2) Å] and C—H⋯O inter­actions stabilize the crystal packing.