Three Copper(II) Coordination Polymers Constructed by Both Rigid and Flexible Ligands

Three new Copper(II) polymers coordinated by both rigid and flexible ligands, [Cu(bpy)(C5H6O4)]n (1), [Cu(bpy)(C6H8O4)]n (2), and [Cu2(bpy)2(C6H8O4)2]n (3) (bpy = 4,4′-bipyridine), have been hydrothermally synthesized and structurally characterized. Complex 1 features a box-like bilayer motif of (4, 4) net. It crystallizes in triclinic space group with cell parameters: a = 8.1395(6) A, b = 9.43 12(8) A, c = 10.5473(8) A, α = 112.1830(1)°, β = 92.423(2)°, γ = 104.752(2)°, V = 716.31(1) A3, Z = 2. Complex 2 crystallizes in triclinic space group with a = 8.8652(4) A, b = 8.9429(4) A, c = 10.6390(4) A, α = 89.520(2)°, β = 69.123(2)°, γ = 75.2440(1)°, V = 758.92(6) A3, Z = 2. Complex 3 crystallizes in monoclinic space group Cc with a = 11.1521(1) A, b = 15.3961(1) A, c = 17.7419(1) A, β = 105.715(3)°, V = 2932.4(5) A3, Z = 4. Complexes 2 and 3 are isomeric with different coordination modes of adipato ligand. Both of them possess the two-fold interpenetrated 3-D pcu topological net.