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Crystals of cadmium zinc diborate, Cd1.17Zn0.83B2O5, have been obtained by spontaneous nucleation in a platinum crucible at 1072 K. The crystal structure exhibits diborate groups, B2O54−, sharing O atoms with considerably distorted M1O6 octa­hedra and M2O4 tetra­hedra. Both metal centers are disordered in the proportion Cd:Zn = 0.92:0.08 on the M1 site and Cd:Zn = 0.25:0.75 on the M2 site. A strong second-harmonic generation has been observed for the title compound when excited with an Nd:YAG laser (λ = 1064 nm). [ABSTRACT FROM AUTHOR]

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 samarium coordination polymer, [Sm(C14H8O4)(C14H9O4)(H2O)2] n, the Sm cation is located on a twofold axis and coordinated in an irregular SmO8 polyhedron, which is linked by the carboxyl­ate groups to form a three-dimensional framework. [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]

The title compound, [CuI(C12H8N2)2]ClO4, was prepared by a hydrothermal reaction at 453 K. The Cu atom has a slightly distorted trigonal–bipyramidal coordination geometry, pentacoordinated by four N atoms of two chelating 1,10-phenanthroline ligands and one I atom. There are supramolecular π–π interactions between neighbouring parallel pyridine rings, with a face-to-face distance of 3.51 (1) Å. [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]

The HoIII center in the title coordination polymer, {[Ho2(C4H4O4)3(H2O)2]·H2O} n, is nine-coordinated in a tricapped trigonal prism by eight O atoms, derived from six carboxyl­ate groups and a water mol­ecule. One of the independent succinate anions is located about a crystallographic center of inversion and the uncoordinated water mol­ecule lies on a twofold axis. The crystal structure comprises edge-shared HoO9 polyhedra linked by succinate bridges, forming a three-dimensional network structure. [ABSTRACT FROM AUTHOR]

The crystal structure of the title compound, C10H8N2·C10H18O4, consists of sebacic acid and 4,4′-bipyridine mol­ecules. The sebacic acid mol­ecule displays an extended planar structure, but the pyridine rings of the 4,4′-bipyridine mol­ecule are twisted relative to each other, with a dihedral angle of 15.78 (7)°. The centroid-to-centroid separation of 3.6366 (11) Å indicates π–π stacking between parallel pyrid­ine rings. [ABSTRACT FROM AUTHOR]

The title polymeric compound, {[Eu2Cu(C7H3O4)4(H2O)6]·2H2O} n, was prepared by a hydro­thermal reaction at 453 K. The EuIII ion has a double-capped trigonal prismatic coordination geometry with an NdNO7 core, while the CuII ion is located on an inversion center and assumes a square-planar coordination geometry. The pyridine-2,5-dicarboxyl­ate dianions bridge the EuIII and CuII ions, forming a three-dimensional polymeric structure. [ABSTRACT FROM AUTHOR]