Bromine–bromine interactions in the packing ofcis,trans,cis-1,2,3,4-tetrakis(bromomethyl)cyclobutane

Abstract

The title compound, C8H12Br4, displays crystallographic inversion symmetry, so that the cyclobutane ring is exactly planar. The ring C—C bond with eclipsed substituents is lengthened somewhat to 1.572 (5) Å. The packing can be described in terms of three Br...Br contacts; two of these combine to form layers of molecules parallel to theacplane, while the third crosslinks the layers in the third dimension. A simple topological descriptor for systems involving Br...Br contacts is proposed.