Figure 2
(a) The polymerization product of the [Cu5Br7]2− anion, with Br atoms at the vertices of a very distorted pentagonal bipyramid and Cu atoms in distorted tetrahedral positions. (b) A topological view of the Cu⋯Cu contacts. Thick lines show Cu⋯Cu distances shorter than 2.9 Å, while dotted lines are used to represent longer distances. Generic atom labels without symmetry codes have been used. |