catena-Poly[[bis­(μ-5-bromo­pyridine-3-carboxyl­ato-κ(2) O:O′)dicopper(II)]-bis­(μ-5-bromo­pyridine-3-carboxyl­ato)-κ(3) O,O′:N;κ(3) N:O,O′]

The title compound [Cu(2)(C(6)H(3)BrNO(2))(4)](n), forms sheets in the bc plane. The structure features the dinuclear paddle-wheel cage motif common to copper(II) carboxyl­ates. The polymeric structure is achieved through bridging between binuclear units by the pyridyl donors of two of the four carboxyl­ates of the cage. Each cage engages in axial bonding at each copper atom to a pyridyl nitro­gen donor and extends two 5-bromo­pyridine-3-carboxyl­ate groups to bridge to adjacent binuclear sites in the bc plane. Each cage is linked to four adjacent cages in the plane. The intra­dimer Cu⋯Cu distance is 2.6465 (5) Å. The remaining 5-bromo­pyridine-3-carboxyl­ate groups project into the inter­lamellar domain and inter­digitate in pairs from each neighboring layer.