catena-Polytetra­kis(μ2-acetato-κ2 O:O′)dicopper(II)(Cu—Cu)-μ2-acetato-κ2 O:O′-bis­μ2-3-(dimethyl­amino)propan-1-olato-κ2 NO:O;κ2 O:NO-bis­(tetra­hydro­furan-κO)copper(II)-μ2-acetato-κ2 O:O′

摘要

The title complex, [Cu4(C5H12NO)2(C2H3O2)6(C4H8O)2]n, consists of dinuclear [Cu2(C5H12NO)2(THF)₂] (THF is tetra­hydro­furan) and [Cu₂(CH₃COO)₄] units linked through acetate ions, generating parallel one-dimensional polymeric chains propagating in the [10] direction. In the first dinuclear unit, Cu^II ions related by inversion symmetry are bridged by two 3-(dimethyl­amino)propan-1-olate ligands. Likewise, a pair of inversion-related Cu^II 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 mol­ecule, with a long Cu—O bond length of 2.476 (5) Å. The geometry around the other metal atom is close to octa­hedral, 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 inter­action. The Cu⋯Cu separation between two acetate-bridged independent Cu centers is 4.860 (2) Å. The THF mol­ecule has methyl­ene groups disordered over two positions, with occupancies of 0.608 (13) and 0.392 (13).