Dibromido[1,1′-dibutyl-2,2′-(pentane-1,1-di­yl)di-1H-benzimidazole]­copper(II)

In the title compound, [CuBr(2)(C(27)H(36)N(4))], the Cu(II) ion exhibits a distorted tetra­hedral coordination geometry provided by two bromide ions and by chelation of two imine N-atom donors from a bis­(benzimidazole) ligand. Chelation results in a six-membered boat-shaped ring which links the benzimidazole groups. Each bis­(benzimidazole) fragment contains three n-butyl substituents, two of which have the expected trans conformation; the third exhibits the higher-energy cis conformation, an orientation consistent with several short intra­molecular C—H⋯Br inter­actions. Essentially planar (r.m.s. deviations of 0.0101 and 0.0183 Å) benzimidazole groups are oriented so as to give the bis­(benzimidazole) fragment a V-shaped appearance in profile with the cis and trans n-butyl groups directed to opposite sides of the planes. In the crystal, columns of mol­ecules along the b-axis direction form layers parallel to the (202) planes. Within a given column, the mol­ecules are linked by C—H⋯Br hydrogen bonds. The mol­ecules in adjacent columns are also linked by inter­molecular C—H⋯π interactions, forming a three-dimensional network.