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In the title monomeric compound, [Zn(C5H2N2O4)(H2O)4], the ZnII atom has a distorted octa­hedral environment and the molecules are linked by O—H⋯O and N—H⋯O hydrogen bonds, forming a three-dimensional supra­molecular structure. [ABSTRACT FROM AUTHOR]

A polymeric cobalt complex, {[Co(C10H8N2)(H2O)4](C8H4O4)·2H2O} n, was synthesized and its crystal structure has been determined by X-ray diffraction. The complex exhibits a polymeric structure consisting of six-coordinated CoII units linked via 4,4′-bi­pyridine (4,4′-bpy) to form a linear chain. The asymmetric unit contains only one half-mol­ecule of the bridging ligand and two coordinated water molecules, the CoII ion and the bridging ligand lying on a twofold rotation axis. Each cobalt(II) ion is in a distorted octahedral environment with a CoN2O4 core; 4,4′-bpy acts as a bridging ligand and four O atoms from coordinated water mol­ecules act as terminal ligands. The chains are linked to (which also lie on twofold axes) uncoordinated phthalate anions and water mol­ecules by extensive hydrogen bonds to form a three-dimensional supramolecular structure. [ABSTRACT FROM AUTHOR]

In the title monomeric compound, [Co(N3)2(C10H8N2)2]ClO4, the CoIII ion has a distorted octahedral coordination geometry formed by four N atoms from two chelating bipyridine ligands and two N atoms from azide groups, with the two azide groups in cis positions. The crystal structure is stabilized by weak C—H...O and C—H...N hydrogen bonding. [ABSTRACT FROM AUTHOR]

The title compound, {[La2(C7H4NO4)2(C7H3NO4)2(H2O)4]·2H2O} n, was prepared by a hydrothermal reaction at 433 K. The asymmetric unit contains two LaIII ions. Each LaIII ion is nine-coordinated in a slightly distorted tricapped trigonal–prismatic coordination geometry, formed by two N atoms from 5-carboxypyridine-2-carboxylate (Hpydc) and pyridine-2,5-dicarboxylate (pydc) ligands, five O atoms from carboxylate groups of one Hpydc and four pydc ligands, and two water molecules. Adjacent LaIII ions are linked together through single bridging carboxylate O atoms and carboxylate groups in a syn– anti mode, forming a two-dimensional layered polymeric structure. Extensive O—H...O hydrogen bonding connects adjacent layers into an infinite three-dimensional supramolecular network structure. The crystal studied was an inversion twin. [ABSTRACT FROM AUTHOR]

The molecule of the title compound, C20H23PO2, displays an E configuration about the C=C bond. The two phenyl rings are nearly perpendicular to each other with a dihedral angle of 80.09 (8)°. Intermolecular O—H...O hydrogen bonding and π–π stacking between parallel benzene rings of adjacent molecules, with a iperpendicular distance of 3.4928 (3) Å, help to stabilize the crystal structure. [ABSTRACT FROM AUTHOR]

In the title mononuclear complex, [Co(C5H2N2O4)(C12H8N2)2]ClO4·2.5H2O, the CoIII atom is in a slightly distorted octahedral environment, coordinated by four N atoms from two N, N′-bidentate phenanthroline ligands, and one O and one N atom of the 5-carboxy-1 H-pyrazole-3-carboxylate ligand. The molecules are linked into a three-dimensional framework by O—H...O hydrogen bonds and π–π interactions. [ABSTRACT FROM AUTHOR]