Li-Cai Zhu

Anilinium 3-(4-hy-droxy-3-meth-oxy-phenyl)prop-2-enoate.

The structure of the title salt, C6H8N+·C10H9O4 −, is stabilized by N—H⋯O and O—H⋯O hydrogen bonding between 3-(4-hydroxy-3-methoxyphenyl)prop-2-enoate anions and anilinium cations, which links the components into a two-dimensional array.

Poly[[di-μ3-nicotinato-μ3-oxalato-samarium(III)silver(I)] dihydrate]

In the title three-dimensional heterometallic complex, {[AgSm(C6H4NO2)2(C2O4)]·2H2O}n, the SmIII ion is eight-coordinated by four O atoms from four different nicotinate ligands and four O atoms from two different oxalate ligands. The three-coordinate AgI ion is bonded to two N atoms from two different nicotinate anions and one O atom from an oxalate anion. These metal coordination units are connected by bridging nicotinate and oxalate ligands, generating a three-dimensional network. The uncoordinated water molecules link the carboxylate groups via O—H⋯O hydrogen bonding. The crystal structure is further stabilized by hydrogen bonds between the water molecules.

Poly[[diaqua-nickel(II)]-μ(2)-4,4'-bipyridine-κN:N'-μ-p-phenyl-enedioxy-diacetato-κO:O'].

The title coordination polymer, [Ni(C10H8O6)(C10H8N2)(H2O)2]n, was obtained by the hydrothermal reaction of nickel(II) sulfate, benzene-1,4-dioxydiacetic acid (p-phenylenedioxydiacetic acid) and 4,4′-bipyridine (4,4′-bpy) in alkaline aqueous solution. Each NiII atom is coordinated by two O atoms from two benzene-1,4-dioxydiacetate ligands, two N atoms from two 4,4′-bpy ligands and two water molecules, and displays a distorted octahedral geometry. The NiII atom and benzene-1,4-dioxydiacetate and 4,4′-bpy moieties lie on inversion centres. The benzene-1,4-dioxydiacetate ligands bridge the NiII atoms to form infinite zigzag chains, which are further interconnected by 4,4′-bpy ligands to form a grid-like layer parallel to the (01) plane. Moreover, there are O—H⋯O hydrogen-bonding interactions within the grid-like layer between the coordinated water molecules and the carboxylate O atoms.

Poly[[(μ(2)-acetato-κO,O':O')aqua-bis-(μ(3)-isonicotinato-κO:O':N)samarium(III)silver(I)] perchlorate].

The title compound, {[AgSm(C6H4NO2)2(CH3CO2)(H2O)]ClO4}n, is a three-dimensional heterobimetallic complex constructed from a repeating dimeric unit. Only half of the dimeric moiety is found in the asymmetric unit; the unit cell is completed by crystallographic inversion symmetry. The SmIII ion is eight-coordinated by four O atoms of four different isonicotinate ligands, three O atoms of two different acetate ligands, and one O atom of a water molecule. The two-coordinate AgI ion is bonded to two N atoms of two different isonicotinate anions, thereby connecting the disamarium units. In addition, the isonicotinate ligands also act as bridging ligands, generating a three-dimensional network. The coordinated water molecules link the carboxylate group and acetate ligands by O—H⋯O hydrogen bonding. Another O—H⋯O hydrogen bond is observed in the crystal structure. The perchlorate ion is disordered over two sites with site-occupancy factors of 0.560 (11) and 0.440 (11), whereas the methyl group of the acetate ligand is disordered over two sites with site-occupancy factors of 0.53 (5) and 0.47 (5).

Poly[[tetra­aqua­(μ4-imidazole-4,5-dicarboxyl­ato)(μ3-imidazole-4,5-dicarboxyl­ato)-μ3-sulfato-μ2-sulfato-cobalt(II)digadolinium(III)] monohydrate]

The asymmetric unit of the title compound, {[CoGd2(C5H2N2O4)2(SO4)2(H2O)4]·H2O}n, contains one CoII ion, two GdIII ions, two imidazole-4,5-dicarboxylate ligands, two SO4 2− anions, four coordinated water molecules and one uncoordinated water molecule. The CoII ion is six-coordinated by two O atoms from two coordinated water molecules, as well as two O atoms and two N atoms from two imidazole-4,5-dicarboxylate ligands, giving a slightly distorted octahedral geometry. Both GdIII ions are eight-coordinated in a distorted bicapped trigonal–prismatic geometry. One GdIII ion is coordinated by four O atoms from two imidazole-4,5-dicarboxylate ligands, three O atoms from three SO4 2− anions and a water O atom; the other GdIII ion is bonded to five O atoms from three imidazole-4,5-dicarboxylate ligands, two O atoms from two SO4 2− anions as well as a water O atom. These metal coordination units are connected by bridging imidazole-4,5-dicarboxylate and sulfate ligands, generating a heterometallic layer parallel to the ac plane. The layers are stacked along the b axis via N—H⋯O, O—H⋯O, and C—H⋯O hydrogen-bonding interactions, generating a three-dimensional framework.

Poly[tetra­deca­aqua­tetra­kis­(μ3-1H-imidazole-4,5-dicarboxyl­ato)tetra-μ3-sulfato-cobalt(II)hexa­gadolinium(III)]

The asymmetric unit of the title compound, [CoGd6(C5H2N2O4)4(SO4)6(H2O)14]n, contains a CoII ion (site symmetry ), three GdIII ions, two imidazole-4,5-dicarboxylate ligands, three SO4 2− anions, and seven coordinated water molecules. The CoII ion is six-coordinated by two O atoms from water molecules, two O atoms and two N atoms from two imidazole-4,5-dicarboxylate ligands, giving a slightly distorted octahedral geometry. The GdIII ions exhibit three types of coordination environments. One Gd ion is eight-coordinated in a bicapped trigonal–prismatic geometry by four O atoms from two imidazole-4,5-dicarboxylate ligands, two O atoms from two SO4 2− anions and two coordinated water molecules. The other Gd ions are nine-coordinated in a tricapped trigonal–prismatic geometry; one of these Gd ions is bonded to four O atoms from two imidazole-4,5-dicarboxylate ligands, three O atoms from three SO4 2− anions and two water O atoms and the other Gd ion is coordinated by one O atom and one N atom from one imidazole-4, 5-dicarboxylate ligand, five O atoms from three SO4 2− anions as well as two coordinated water molecules. These metal coordination units are connected by bridging imidazole-4,5-dicarboxylate and sulfate ligands, generating a three-dimensional network. The crystal structure is further stabilized by N—H⋯O, O—H⋯O, and C—H⋯O hydrogen-bonding interactions between water molecules, SO4 2− anions, and imidazole-4,5-dicarboxylate ligands.

Poly[[tetra­aqua­bis­(μ3-imidazole-4,5-dicarboxyl­ato)tetra­kis­(μ2-imidazole-4,5-dicarboxyl­ato)tricobalt(II)dilutetium(III)] dihydrate]

In the title compound, {[Co3Lu2(C5H2N2O4)6(H2O)4]·2H2O}n, the LuIII ions are seven-coordinated in a monocapped trigonal prismatic coordination geometry by six O atoms from three imidazole-4,5-dicarboxylate ligands and one water O atom. The CoII ions are six-coordinated in a slightly distorted octahedral geometry and exhibit two types of coordination environments. One CoII ion, located on an inversion center, is coordinated by two water O atoms as well as two O atoms and two N atoms from two imidazole-4,5-dicarboxylate ligands. The other CoII ion is bonded to four O atoms and two N atoms from four imidazole-4,5-dicarboxylate ligands. These metal coordination units are connected by bridging imidazole-4,5-dicarboxylate ligands, generating a three-dimensional network. The crystal structure is further stabilized by N—H⋯O, O—H⋯O, and C—H⋯O hydrogen-bonding interactions between the water molecules and the imidazole-4,5-dicarboxylate ligands.

Poly[diaqua­bis­(μ3-1H-imidazole-4,5-dicarboxyl­ato)(μ2-sulfato)­diytterbium(III)]

In the title compound, [Yb2(C5H2N2O4)2(SO4)(H2O)2]n, the YbIII ion is eight-coordinated by four O atoms and one N atom from three imidazole-4,5-dicarboxylate ligands, two O atoms from one SO4 2− anion (site symmetry 2), as well as one O atom of a water molecule, giving a bicapped trigonal–prismatic coordination geometry. The metal coordination units are connected by bridging imidazole-4,5-dicarboxylate and sulfate ligands, generating a heterometallic layer. The layers are stacked along the a axis via N—H⋯O, O—H⋯O, and C—H⋯O hydrogen-bonding interactions, generating a three-dimensional framework.

Ethyl-enediammonium bis-(3,4-dihy-droxy-benzoate) monohydrate.

In the title compound, C2H10N2 2+·2C7H5O4 −·H2O, the cation lies on a centre of symmetry. The crystal structure is stabilized by various intermolecular O—H⋯O and N—H⋯O hydrogen bonds, and by weak π–π stacking interactions with centroid–centroid distances between symmetry-related benzene rings ranging from 3.5249 (13) to 3.7566 (14) Å.

Ammonium (E)-3-(4-hy-droxy-3-meth-oxy-phen-yl)prop-2-enoate monohydrate.

In structure of the title compound ammonium ferulate monohydrate, NH4 +·C10H9O4 −·H2O, O—H⋯O and N—H⋯O hydrogen bonds link the ammonium cations, ferulate anions and water molecules into a three-dimensional array. The ferulate anion is approximately planar, with a maximum deviation of 0.307 (2) Å.