Crystal Structure Of Bis(Μ-3-NitroBenzoato)-Κ3 O,O′:O;Κ3 O:O,O′-Bis[Bis(3-CyanoPyridine-Κn 1)(3-NitroBenzoato-Κ2 O,O′)Cadmium]
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In the title cadmium complex of 3-nitrobenzoate and 3-cyanopyridine, binuclear centrosymmetric molecules are present, with cadmium being surrounded in an N2O5 coordinaton set in a distorted pentagonal–bipyramidal shape., The asymmetric unit of the title compound, [Cd2(C7H4NO4)4(C6H4N2)4], contains one CdII atom, two 3-nitrobenzoate (NB) anions and two 3-cyanopyridine (CPy) ligands. The two CPy ligands act as monodentate N(pyridine)-bonding ligands, while the two NB anions act as bidentate ligands through the carboxylate O atoms. The centrosymmetric dinuclear complex is generated by application of inversion symmetry, whereby the CdII atoms are bridged by the carboxylate O atoms of two symmetry-related NB anions, thus completing the distorted N2O5 pentagonal–bipyramidal coordination sphere of each CdII atom. The benzene and pyridine rings are oriented at dihedral angles of 10.02 (7) and 5.76 (9)°, respectively. In the crystal, C—H⋯N hydrogen bonds link the molecules, enclosing R 2 2(26) ring motifs, in which they are further linked via C—H⋯O hydrogen bonds, resulting in a three-dimensional network. In addition, π–π stacking interactions between parallel benzene rings and between parallel pyridine rings of adjacent molecules [shortest centroid-to-centroid distances = 3.885 (1) and 3.712 (1) Å, respectively], as well as a weak C—H⋯π interaction, may further stabilize the crystal structure.