In the ionic title complex, (C13H11N2)2[Ni(C4N2S2)2], the NiII ion is located on an inversion centre so the asymmetric unit contains one-half [Ni(mnt)2]2− dianion (mnt2− is maleonitriledithiolate) and one 1-(3-cyanobenzyl)pyridinium cation ([CNBzPy]+). The NiII ion in the [Ni(mnt)2]2− anion is coordinated by four S atoms of two mnt2− ligands, and exhibits square-planar coordination geometry. In the [CNBzPy]+ cation, the benzene and pyridine rings are twisted with respect to the C/C/N plane incorporating the methylene C atom that links them. The crystal structure is stabilized by Coulombic interactions.
The title complex, (C5H7N2)[PbI3], consists of a 1-aminopyridinium cation, disordered about a mirror plane, and a [PbI3]− anion. The Pb2+ ion (site symmetry ) is surrounded by six I atoms in a slightly distorted octahedral coordination. The PbI6 octahedra share faces, building up ∞
1[PbI6/2] chains running along [010]. The cations are situated between the chains. Coulombic attractions and van der Waals interactions between the inorganic and organic components are mainly responsible for the cohesion of the structure.
In the crystal structure of the title compound, (C12H11Cl2N2)2[Ni(C4N2S2)2], the NiII complex dianion is located on an inversion centre. The NiII atom is coordinated by four S atoms in a square-planar geometry. In the cation, the dihedral angle between the benzene and pyrazine rings is 85.2 (2)°.
In the title compound, [Zn(C14H11O2)2(C10H8N2)(H2O)2]n, the ZnII ion lies on a crystallographic inversion center and is in a slightly distorted octahedral coordination enviroment. 4,4′-Bipyridine ligands act as bridging ligands, connecting ZnII ions into a chain along the b-axis direction. In the crystal structure, these chains are linked by intermolecular O—H⋯O hydrogen bonds to form a two-dimensional network parallel to the ab plane.
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