Hu Zang

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-[bis­(2-hy­droxy­eth­yl)amino]­ethanol-κ4O,N,O′,O′′}cadmium terephthalate

In the title salt, [Zn(C6H15NO3)2](C8H4O4), the ZnII cation, located on a centre of inversion, is coordinated by four O atoms and two N atoms from two tridentate 2-[bis(2-hydroxyethyl)amino]ethanol (BHEA) ligands, giving rise to a slightly distorted octahedral geometry. The terephthalate dianion, located about a centre of inversion, is not coordinated to ZnII but is connected through O—H⋯O contacts with [Zn(BHEA)2]2+ cations, leading to a three-dimensional crystal 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.

catena-Poly[[[aqua­(1,10-phenanthro­line)zinc(II)]-μ-3,3′-(p-phenyl­ene)di­acrylato] hemihydrate]

In the title compound, {[Zn(C12H8O4)(C12H8N2)(H2O)]·0.5H2O}n, each ZnII atom is six-coordinated by two N atoms from one 1,10-phenanthroline (phen), three carboxylate O atoms from two different L ligands [H2 L = 3,3′-(p-phenylene)diacrylic acid] and one water molecule in a distorted octahedral environment. The two L dianions are situated across inversion centres and bridge neighbouring ZnII centres, yielding a chain propagating parallel to [100]. O—H⋯O hydrogen bonds between the coordinated water molecule, the solvent water molecule (half-occupied) and the carboxylate O atoms further stabilize the structure.

A novel parallel interpenetrating two-dimensional (4,4) network: poly[[μ2-1,4-bis(imidazol-1-ylmethyl)benzene](μ2-naphthalene-1,4-dicarboxylato)zinc(II)]

In the title coordination compound, [Zn(C(12)H(6)O(4))(C(14)H(14)N(4))](n), the two Zn(II) centers exhibit different coordination environments. One Zn(II) center is four-coordinated in a distorted tetrahedral environment surrounded by two carboxylate O atoms from two different naphthalene-1,4-dicarboxylate (1,4-ndc) anions and two N atoms from two distinct 1,4-bis(imidazol-1-ylmethyl)benzene (1,4-bix) ligands. The coordination of the second Zn(II) center comprises two N atoms from two different 1,4-bix ligands and three carboxylate O atoms from two different 1,4-ndc ligands in a highly distorted square-pyramidal environment. The 1,4-bix ligand and the 1,4-ndc anion link adjacent Zn(II) centers into a two-dimensional four-connected (4,4) network. The two (4,4) networks are interpenetrated in a parallel mode.

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.

Poly[hexa­aqua­(μ9-cyclo­hexane-1,2,3,4,5,6-hexa­carboxyl­ato)trimanganese(II)]

The asymmetric unit of the title compound, [Mn3(C12H6O12)(H2O)6]n, comprises one MnII ion, one third of a cyclohexane-1,2,3,4,5,6-hexacarboxylate anion and two aqua ligands. The anion is completed by application of a -3 axis. The MnII ion is six-coordinated by six O atoms from two aqua ligands and three different cyclohexacarboxylate anions in an octahedral geometry. The six carboxylate groups adopt a bridging bidentate mode to ligate the MnII ions. Thus, each cyclohexane-1,2,3,4,5,6-hexacarboxylate anion adopts a μ9-connected mode, ligating nine different MnII ions and forming a three-dimensional framework. In the framework, there are strong O—H⋯O hydrogen-bonding interactions, which further stabilize the crystal structure.

2',6'-Bis(4-carb-oxy-phen-yl)-4,4'-bipyridin-1-ium nitrate 0.25-hydrate.

In the title compound, C24H17N2O4 +·NO3 −·0.25H2O, the central pyridine ring of the 2′,6′-bis(4-carboxyphenyl)-4,4′-bipyridin-1-ium cation is almost coplanar with one benzene ring [dihedral angle = 1.03 (5)°], while it makes dihedral angles of 9.59 (5)° with the other benzene ring and 13.66 (6)° with the pyridinium ring. In the crystal, N—H⋯O and O—H⋯O hydrogen bonds link the cations and nitrate anions into a sheet in the (302) plane. The crystal structure also exhibits π–π interactions between the central pyridine ring and the benzene rings of neighboring molecules [centroid–centroid distance = 3.6756 (13) 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].