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The title compound, [Co(C12H8N2)(H2O)4]2(C10H2O8), consists of discrete tetra­aqua­(1,10-phenanthroline)cobalt(II) cations and 1,2,4,5-benzene­tetra­carboxyl­ate anions. The CoII atom is octa­hedrally coordinated by two N atoms of the 1,10-phenanthroline ligand and four O atoms of water mol­ecules. The anion lies on an inversion centre. A two-dimensional hydrogen-bonding network is formed by O atoms of benzene­tetra­carboxyl­ate and the coordinated water mol­ecules. [ABSTRACT FROM AUTHOR]

The novel title ZnII coordination polymer, poly[bis(μ-6-thioxo-1,6-dihydropyridine-3-carboxylato-κ2 S: O)zinc(II)], [Zn(C6H4NO2S)2] n, consists of two crystallographically independent zinc centers and two 6-mercaptonicotinate (Hmna−) ligands. Each ZnII atom is four-coordinated and lies at the center of a distorted tetrahedral ZnS2O2 coordination polyhedron, bridged by four Hmna− ligands to form a two-dimensional (4,4)-network. Each Hmna− ion acts as a bridging bidentate ligand, coordinating to two ZnII atoms through the S atom and a carboxyl O atom. The metal centers reside on twofold rotation axes. The coordination mode of the S atoms and N—H...O hydrogen-bonding interactions between the protonated N atoms and the uncoordinated carboxyl O atoms give the extended structure a wavelike form. [ABSTRACT FROM AUTHOR]

A nickel(II) coordination polymer, catena-poly[[aqua­tri­pyri­dinenickel(II)]-μ-isophthalato], [Ni(C8H4O4)(C5H5N)3(H2O)] n, obtained by reaction of m-bda, pyridine and Ni(NO3)2·6H2O under hydro­thermal conditions, where m-bda is isophthalic acid, was characterized by single-crystal X-ray diffraction. The NiII atom is six-coordinate and lies at the centre of a distorted octa­hedron, coordinated by two carboxylate O atoms from two m-bda ligands, three N atoms from three pyridine mol­ecules and one water mol­ecule. The carboxylate groups of m-bda link the NiII atoms, forming an extended one-dimensional zigzag chain. The chains are then knitted together, forming a two-dimensional supramolecular arrangement, via C—H⋯O hydrogen bonds between the H atoms of pyridine rings and the coordinated carboxylate O atoms of m-bda. [ABSTRACT FROM AUTHOR]