Crystal structure of tetra-kis-[?-2-(meth-oxy-carbon-yl)benzoato-?2O1:O1']bis-[(N,N-di-methyl-formamide-?O)copper(II)](Cu-Cu) di-methyl-formamide disolvate.
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ABSTRACT: The title compound, [Cu2(C9H7O4)4(C3H7NO)2]·2C3H7NO, crystallizes in the monoclinic P21/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 CuII ion, two 2-(meth-oxy-carbon-yl)benzoate ligands, and two DMF mol-ecules (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 octa-hedral coordination environment. Each 2-(meth-oxy-carbon-yl)benzoate substituent acts as a bridging ligand and links two Cu atoms with a Cu-Cu distance of 2.633?(1)?Å. The carboxyl-ate groups of the 2-(meth-oxy-carbon-yl)benzoate ligands adopt bidentate syn-syn bridging modes, with dihedral angles between the carboxyl-ate planes and the aromatic rings of 18.427?(4) and 43.029?(6)°. In the crystal, adjacent DMF mol-ecules coordinated to copper atoms are arranged in a mutual 'head-to-tail' manner by offset face-to-face ?-? stacking inter-actions, resulting in chains along the c-axis direction. The planes of the coordinated DMF mol-ecules 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?? inter-molecular inter-actions involving the DMF solvent mol-ecules. One of the methyl ester groups is disordered over two sites with an occupancy ratio of 0.751?(12):0.249?(12).
SUBMITTER: Wang J
PROVIDER: S-EPMC5947489 | biostudies-other | 2018 May
REPOSITORIES: biostudies-other
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