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The article describes how a previously unreported dianion can affect the crystallization of polymeric metal complex cations. The structures of both title compounds are described in detail. It examines the two-coordinate Ag structure features of the title compounds. Also illustrated are the two-dimensional supramolecular layered architectures of the title compounds.

In the title compound, C6H7N3O2·H2O, all atoms of 2-ureidopyridine N-oxide molecule are approximately coplanar and adjacent molecules are connected by strong hydrogen bonds, resulting in a three-dimensional network. [ABSTRACT FROM AUTHOR]

The title complex, [Cu(C7H2N2O7)(C4H8N2O2)(H2O)], is a mononuclear copper(II) compound. The CuII ion is five-coordinated in a distorted pyramidal geometry by two N atoms from one dimethylglyoxime molecule, two O atoms from one 3,5-dinitro-2-oxidobenzoate ligand and one O atom from a water molecule. Strong hydrogen bonds connect adjacent molecules into a three-dimensional network. [ABSTRACT FROM AUTHOR]

The title polymer, [Cu(C6H5O6PS)(C10H8N2)(H2O)] n, was synthesized by a hydrothermal method. The CuII ion is five-coordinated by one phosphonate O atom, one sulfonate O atom, two N atoms of the bipyridyl ligand and one water molecule. The coordination geometry around the metal centre can be described as slightly distorted square-pyramidal. The CuII ions are connected by bidentate bridging phosphonato-benzenesulfonate ligands, forming one-dimensional helical chains along [010], which are further bridged by bidentate 4,4′-bipyridyl ligands, generating a two-dimensional layered crystal structure. The layered structure features an eight-membered ring including four CuII ions, two [O3S–C6H4–PO3H]2− anions and two 4,4′-bipyridyl ligands. Hydrogen bonds involving aqua ligands, phosphonate O and sulfonate O atoms are observed between the layers, [ABSTRACT FROM AUTHOR]

The title complex, [Co(C12H8N2)(H2O)4](C10H6O6S2)·2H2O, was synthesized hydrothermally. The Co2+ cation, which lies on a twofold rotation axis, is six-coordinate. The anion is located on a centre of inversion. An extensive network of O—H⋯O hydrogen bonds links the components into a threedimensional network. [ABSTRACT FROM AUTHOR]