Crystal structure of catena-polyhemi13-bis­(26-diisoprop­ylphenyl)imidazolium μ3-acetato-κ3O:O:O′-tri-μ2-acetato-κ6O:O′-dicopper(II)(Cu—Cu)-μ-chlorido di­chloro­methane sesqui­solvate

摘要

The title copper(II) complex, {(C27H37N2)[Cu4(CH3COO)8Cl]·3CH2Cl2}n, is a one-dimensional coordination polymer. The asymmetric unit is composed of a copper(II) tetra­acetate paddle-wheel complex, a Cl⁻ anion situated on a twofold rotation axis, half a 1,3-bis­(2,6-diisoprop­ylphenyl)imidazolium cation (the whole mol­ecule being generated by twofold rotation symmetry) and one and a half of a di­chloro­methane solvent mol­ecule (one being located about a twofold rotation axis). The central metal-organic framework comprises of a tetra­nuclear copper(II) acetate ‘paddle-wheel’ complex which arises from the dimerization of the copper(II) tetra­acetate core comprising of three μ2-bidentate acetate and one μ3-tridentate acetate ligands per binuclear paddle-wheel complex. Both Cu^II atoms of the binuclear component adopt a distorted square-pyramidal coordination geometry (τ = 0.04), with a Cu⋯Cu separation of 2.6016 (2) Å. The apical coordination site of one Cu^II atom is occupied by an O atom of a neighbouring acetate bridge [Cu—O = 2.200 (2) Å], while that of the second Cu^II atom is occupied by a bridging chloride ligand [Cu⋯Cl = 2.4364 (4) Å]. The chloride bridge is slightly bent with respect to the Cu⋯Cu inter­nuclear axis [Cu—Cl—Cu = 167.06 (6)°] and the tetra­nuclear units are located about a twofold rotation axis, forming the one-dimensional polymer that propagates along [101]. Charge neutrality is maintained by the inclusion of the 1,3-bis­(2,6-diisoprop­ylphenyl)imidazolium cation within the crystal lattice. In the crystal, the cation and di­chloro­methane solvent mol­ecules are linked to the coordin­ation polymer by various C—H⋯O and C—H⋯Cl hydrogen bonds. There are no other significant inter­molecular inter­actions present.