Crystal structure of the two-dimensional coordination polymer poly[di-μ-bromido-bis-(μ-tetra-hydro-thiophene)-dicopper(I)].

The polymeric title compound, [Cu(2)Br(2)(C(4)H(8)S)(2)] (n) , CP1, represents an example of a two-dimensional coordination polymer resulting from reaction of CuBr with tetra-hydro-thio-phene (THT) in MeCN solution. The two-dimensional layers consist of two different types of rhomboid-shaped dinuclear Cu(μ(2)-Br)(2)Cu secondary building units (SBUs); one with a quite loose Cu⋯Cu separation of 3.3348†(10)†à and a second one with a much closer inter-metallic contact of 2.9044†(9)†à . These SBUs are inter-connected through bridging THT ligands, in which the S atom acts as a four-electron donor bridging each Cu(μ(2)-Br)(2)Cu unit in a μ(2)-bonding mode. In the crystal, the layers are linked by very weak C-H⋯·Br hydrogen bonds with H⋯Br distances of 2.95†à , thus giving rise to a three-dimensional supra-molecular network.