Liying Han

Poly[diaqua-bis-[μ-1-hy-droxy-2-(imidazol-3-ium-1-yl)ethane-1,1-diyldiphospho-nato]tricopper(II)].

In the title coordination polymer, [Cu3(C5H7N2O7P2)2(H2O)2]n, one CuII atom is five-coordinated by five O atoms from three 1-hydroxy-2-(imidazol-3-ium-1-yl)ethane-1,1-diyldiphosphonate (L) ligands in a distorted square-pyramidal geometry. The other CuII atom, lying on an inversion center, is six-coordinated in a distorted octahedral geometry by four O atoms from two L ligands and two O atoms from two water molecules. The five-coordinated CuII atoms are linked by phosphonate O atoms of the L ligands, forming a polymeric chain. These chains are further linked by the six-coordinated Cu atoms into a layer parallel to (01). N—H⋯O and O—H⋯O hydrogen bonds connect the layers into a three-dimensional supramolecular structure.

Crystal structure of bis­{2-[(2-hy­droxy­eth­yl)amino]­ethanol-κ3O,N,O′}copper(II) terephthalate

The molecular components of the title salt, [Cu(C4H11NO2)2](C8H4O4), are one CuII cation O,N,O′-chelated by two tridentate 2-[(2-hydroxyethyl)amino]ethanol ligands, and a terephthalate counter-dianion, located about a centre of inversion. The complex CuII cation is located about a centre of inversion and shows typical Jahn–Teller distortion, with two short Cu—O and two short Cu—N bonds in the equatorial plane and two long Cu—O bonds to the axial atoms. The cations are arranged in sheets parallel to (100), with the centrosymmetric terephthalate anions located between the sheets. Each anion is the acceptor of four O—H⋯O and two N—H⋯O hydrogen bonds, forming a three-dimensional network structure.

catena-Poly[[[aqua­(pyridine-4-carboxyl­ato-κN)silver(I)]-μ-hexa­methyl­ene­tetra­amine-κ2N:N′] dihydrate]

In the title compound, {[Ag(C6H4NO2)(C6H12N4)(H2O)]·2H2O}n, the AgI atom shows a distorted triangular pyramidal geometry,, formed by two N atoms from two hexamethylenetetraamine (hmt) ligands and one N atom from a pyridine-4-carboxylate (4-pdc) ligand and one water molecule. The hmt ligands bridge the Ag atoms, forming a chain along [001]. The carboxylate group of the 4-pdc ligand is uncoordinated. O—H⋯O hydrogen bonds between the water molecules and carboxylate groups stabilize the structure.

Crystal structure of bis­{μ-4,4′-[1,3-phenyl­enebis(­oxy)]dibenzoato-κ4O,O′:O′′,O′′′}bis[(1,10-phenanthroline-κ2N,N′)zinc(II)] dihydrate

Two 4,4′-[1,3-phenylenebis(oxy)]dibenzoate anions bridge two 1,10-phenanthroline-chelated ZnII cations about a center of inversion to generate the dinuclear title compound, [Zn2(C20H12O6)2(C12H8N2)2]·2H2O. The geometry about the ZnII atom is a distorted octahedron. In the crystal, the molecules are connected by classical O—H⋯O hydrogen bonds, weak C—H⋯O hydrogen bonds and C—H⋯π interactions, forming a three dimensional network. π–π stacking is also observed between aromatic rings of adjacent molecules, centroid–centroid distances are 3.753 (2), 3.5429 (16) and 3.5695 (17) Å.

Crystal structure of poly[[{μ2-1,4-bis[(1H-imid-azol-1-yl)methyl]benzene}[μ6-5-(4-carboxylatophenoxy)isophthalato]-μ3-hydroxido-dicobalt(II)] 0.25-hydrate].

The title coordination polymer, {[Co2(C15H7O7)(OH)(C14H14N4)]·0.25H2O}n, was synthesized under hydrothermal conditions. The asymmetric unit contains two Co2+ ions, one L 3− anion originating from 5-(4-carboxyphenoxy)isophthalic acid (H3 L), one OH− ligand, one 1,4-bis[(1H-imidazol-l-yl)methyl]benzene (bix) ligand and one disordered lattice water molecule (occupancy 0.25). The two Co2+ ions have different environments. One has an octahedral O4N2 coordination sphere, defined by four O atoms from three carboxylate groups and one OH− ligand, and two N atoms from two symmetry-related bix ligands. The other has a trigonal-bipyramidal O5 coordination sphere resulting from three carboxylate groups and two OH− ligands. The dihedral angles between the two benzene rings in the L 3− ligand and between the benzene ring and the two imidazole rings in the bix ligand are 67.05 (15), 75.27 (17) and 82.05 (17)°, respectively. Four neighbouring Co2+ ions are linked by six carboxylate groups and two μ 3-OH ligands, forming a butterfly-shaped secondary building unit (SBU). These SBUs are connected by L 3− anions into layers parallel to (1-10). Adjacent layers are cross-linked by the bix ligands, forming a three-dimensional framework that has a bimodal (3,8)-connected tfz-d topology. The disordered lattice water molecule is located in the voids of the framework and has O⋯O and O⋯N contacts of 2.81 (2) and 2.95 (2) Å, suggesting medium-strength hydrogen bonds. The title compound may be a good candidate for artificial eye lenses.

Crystal structure of poly[[μ3-4,4'-(4,4'-bipyridine-2,6-diyl)dibenzoato]{μ2-4-[6-(4-carboxyphenyl)-4,4'-bipyridin-4'-ium-2-yl]benzoato}manganese(II)] hemi-hydrate].

The title compound, {[Mn(C24H14N2O4)(C24H16N2O4)]·0.5H2O}n, was obtained by the reaction of manganese nitrate with the ligand 4,4′-(4,4′-bipyridine-2,6-diyl) dibenzoic acid under hydrothermal conditions. The water O atom is located on a twofold rotation axis. The Mn2+ ion is heptacoordinated by six O atoms and one N atom from the ligands. In this structure, the ligands adopts two different forms, one completely deprotonated and one with a protonated N atom (pyridinium) and a carboxylic acid function. In the crystal, N—H⋯O and O—H⋯O hydrogen bonds consolidate the packing, forming a three-dimensional framework.

Bis[6-(1H-benzimidazol-2-yl-κN)pyridine-2-carboxyl-ato-κN,O]cobalt(II) dihydrate.

In the title compound, [Co(C13H8N3O2)2]·2H2O, the CoII atom has a distorted octahedral environment defined by four N atoms and two O atoms from two 6-(1H-benzimidazol-2-yl)pyridine-2-carboxylate ligands. In the crystal, the complex molecules and uncoordinated water molecules are linked via N—H⋯O and O—H⋯O hydrogen bonds, forming a two-dimensional supramolecular structure parallel to (010). π–π interactions are present between the imidazole, pyridine and benzene rings [centroid–centroid distances = 3.528 (2), 3.592 (2), 3.680 (2) and 3.732 (3) Å].

catena-Poly[[zinc-bis­(μ-2-sulfido-1H-benzimidazol-3-ium-5-carboxyl­ato)-κ2O:S;κ2S:O] trihydrate]

In the title compound, {[Zn(C8H5N2O2S)2]·3H2O}n, the ZnII atom, lying on a twofold rotation axis, is four-coordinated by two S atoms and two O atoms from four 2-sulfido-1H-benzimidazol-3-ium-5-carboxylate (H2mbidc) ligands in a distorted tetrahedral geometry. Two H2mbidc ligands bridge two ZnII atoms, generating a double-chain along [01]. Adjacent chains are linked by N—H⋯O and O—H⋯O hydrogen bonds, forming a three-dimensional supramolecular network. One of the two water molecules also lies on a twofold rotation axis.

3-(Pyridin-4-ylmeth-oxy)phenol.

In the title compound, C12H11NO2, the phenolic ring is inclined at an angle of 32.70 (1)° with respect to the pyridine ring. In the crystal, intermolecular O—H⋯N hydrogen bonds link the molecules into C(11) chains along [001].

catena-Poly[[[aqua­(pyrazino[2,3-f][1,10]phenanthroline)cadium(II)]-μ-4,4′-ethyl­enedibenzoato] N,N-dimethyl­formamide hemisolvate]

In the title compound, [Cd(C16H10O4)(C14H8N4)(H2O)]·0.5C3H7NO, the CdII atom is six-coordinated by two N atoms from one pyrazino[2,3-f][1,10]phenanthroline ligand, three carboxylate O atoms from two different 4,4′-ethylenedibenzoate ligands, and one water molecule in a distorted octahedral environment. The two 4,4′-ethylenedibenzoate dianions are located on inversion centres bridging two neighboring CdII centres. O—H⋯O hydrogen-bonding interactions further stabilize the crystal structure. The DMF molecule is equally disordered about a center of inversion.