Crystal structure of tetra­kis­[μ-2-(meth­oxy­carbon­yl)benzoato-κ(2) O (1):O (1′)]bis­[(N,N-di­methyl­formamide-κO)copper(II)](Cu—Cu) di­methyl­formamide disolvate

The title compound, [Cu(2)(C(9)H(7)O(4))(4)(C(3)H(7)NO)(2)]·2C(3)H(7)NO, crystallizes in the monoclinic P2(1)/c space group, with the binuclear copper unit occupying a special position on an inversion center, i.e. the asymmetric unit of the crystal consists of one Cu(II) ion, two 2-(meth­oxy­carbon­yl)benzoate ligands, and two DMF mol­ecules (one coordinated and one solvate). The binuclear complex displays a paddle-wheel-shaped structure with the two copper atoms being in a Jahn–Teller-distorted octa­hedral coordination environment. Each 2-(meth­oxy­carbon­yl)benzoate substituent acts as a bridging ligand and links two Cu atoms with a Cu—Cu distance of 2.633 (1) Å. The carboxyl­ate groups of the 2-(meth­oxy­carbon­yl)benzoate ligands adopt bidentate syn–syn bridging modes, with dihedral angles between the carboxyl­ate planes and the aromatic rings of 18.427 (4) and 43.029 (6)°. In the crystal, adjacent DMF mol­ecules coordinated to copper atoms are arranged in a mutual ‘head-to-tail’ manner by offset face-to-face π–π stacking inter­actions, resulting in chains along the c-axis direction. The planes of the coordinated DMF mol­ecules are parallel to each other, the distance between them being 3.33 (1) Å. A three-dimensional structure is assembled from the chains by weak C—H⋯O and C—H⋯π inter­molecular inter­actions involving the DMF solvent mol­ecules. One of the methyl ester groups is disordered over two sites with an occupancy ratio of 0.751 (12):0.249 (12).