Catena-Poly[[tetra-kis(μ2-acetato-κ2 O:O′)dicopper(II)(Cu - Cu)]-μ2-acetato-κ2 O:O′-[bis-[μ2-3-(dimethyl-amino)propan-1-olato] -κ2 N,O:O;κ2 O:N,O-bis-[(tetra-hydro-furan- κO)copper(II)]]-μ2-acetato-κ2 O:O′]

The title complex, [Cu4(C5H12NO)2(C2H3O2)6(C4H8O)2] n , consists of dinuclear [Cu2(C5H12NO)2(THF)2] (THF is tetra-hydro-furan) and [Cu2(CH3COO)4] units linked through acetate ions, generating parallel one-dimensional polymeric chains propagating in the [1 0] direction. In the first dinuclear unit, Cu II ions related by inversion symmetry are bridged by two 3-(dimethyl-amino)propan-1-olate ligands. Likewise, a pair of inversion-related CuII ions are bridged by four acetate groups. The crystallographically independent Cu centers are linked to one another by a single bridging acetate group, generating an infinite chain. The distorted square-pyramidal coordination of the first metal center is completed with an apical THF mol-ecule, with a long Cu - O bond length of 2.476 (5) Å. The geometry around the other metal atom is close to octa-hedral, and the Cu⋯Cu separation in this unit is 2.652 (1) Å. The distance between the metal centers in the first dinuclear unit is considerably longer [3.068 (1) Å], suggesting little or no bonding inter-action. The Cu⋯Cu separation between two acetate-bridged independent Cu centers is 4.860 (2) Å. The THF mol-ecule has methyl-ene groups disordered over two positions, with occupancies of 0.608 (13) and 0.392 (13).