catena-Poly[[tetrakis(μ2-acetato-κ2 O:O′)dicopper(II)(Cu—Cu)]-μ2-acetato-κ2 O:O′-[bis[μ2-3-(dimethylamino)propan-1-olato]-κ2 N,O:O;κ2 O:N,O-bis[(tetrahydrofuran-κO)copper(II)]]-μ2-acetato-κ2 O:O′]

Abstract

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 [1\overline{1}0] direction. In the first dinuclear unit, CuII ions related by inversion symmetry are bridged by two 3-(dimethylamino)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 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).