title: Poly[(μ-pentafluorobenzoato-κ²O:O')(pentafluorobenzoato-κO)(μ-pyrazine-κ²N:N')copper(II)]: a coordination polymer linked into a three-dimensional network by intermolecular C-H···F-C interactions.
abstract: In the title compound, [Cu(C6F5COO)2(C4H4N2)]n, (I), the asymmetric unit contains one Cu(II) cation, two anionic pentafluorobenzoate ligands and one pyrazine ligand. Each Cu(II) centre is five-coordinated by three O atoms from three independent pentafluorobenzoate anions, as well as by two N atoms from two pyrazine ligands, giving rise to an approximately square-pyramidal coordination geometry. Adjacent Cu(II) cations are bridged by a pyrazine ligand and two pentafluorobenzoate anions to give a two-dimensional layer. The layers are stacked to generate a three-dimensional supramolecular architecture via strong intermolecular C-H···F-C interactions, as indicated by the F···H distance of 2.38 Å.
authors.affiliation: Key Laboratory of Inorganic Chemistry in Universities of Shandong Province, Department of Chemistry and Chemical Engineering, Jining University, Qufu 273155, People's Republic of China.
authors.forename: Li-Juan
authors.initials: LJ
authors.lastname: Han
authors.affiliation: Key Laboratory of Inorganic Chemistry in Universities of Shandong Province, Department of Chemistry and Chemical Engineering, Jining University, Qufu 273155, People's Republic of China.
authors.forename: Ya-Jie
authors.initials: YJ
authors.lastname: Kong
keywords: crystal structure; five-coordinate copper; intermolecular C—H...F—C interactions; two-dimensional coordination polymer