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The asymmetric unit of the title one-dimensional coordination polymer, {[Co(C10H8N2)(H2O)4](C9H6O5)·H2O}n, comprises two half-cations, [Co(4,4′-bipy)(H2O)4]22+ (4,4′-bipy is 4,4′-bi­pyridine), one 3-carboxyl­ato­phenoxy­acetate (3-CPOA2−) dianion and one non-coordinated water mol­ecule. The CoII ions, both of which are located on inversion centres, have approximately octahedral geometries, involving two N atoms of the centrosymmetric 4,4′-bipy ligand and four water mol­ecules. Adjacent CoII atoms are linked by 4,4′-bipy ligands into a chain, the shortest Co...Co separation within the polymeric chain being 11.456 (2) Å. The chains are further linked by hydrogen-bonding and π–π stacking interactions, generating a three-dimensional network.

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The crystal structure of the title complex, {[Zn(C10H8N2)(H2O)4](C9H6O5)·H2O}n, is built of infinite polymeric cationic {[Zn(4,4′-bipy)(H2O)4]2+}n chains (4,4′-bipy = 4,4′-bi­pyri­dine), 3-carboxyl­ato­phenoxy­acetate dianions (3-CPOA2−) and solvent water mol­ecules. Both symmetry-independent Zn atoms and 4,4′-bipy ligands occupy special positions on crystallographic inversion centres and form two symmetry-independent cationic chains stretching along the c axis of the crystal. Each of the two Zn atoms has an octahedral coordination environment formed by the O atoms of four water mol­ecules and the N atoms of two 4,4′-bipy ligands in trans positions with respect to each other. The 4,4′-bipy ligands perform a bridging function, linking together two adjacent Zn atoms in the chain. The shortest Zn...Zn separation within the chains is equal to the c translation [11.425 (2) Å]. The chains are further linked into a three-dimensional supra­molecular network via hydrogen-bonding and π–π stacking interactions, involving the dianion and the coordinated and uncoordinated water mol­ecules.

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In the title coordination polymer, [Mn(HIDC)(H2O)]n (HIDC2− is the 1H-imidazole-4,5-dicarboxyl­ate dianion, C5H2N2O4), each MnII atom is in an octahedral coordination by one N atom and four carboxyl­ate O atoms from three HIDC2− anions, and one water molecule. The MnII atoms are linked by HIDC2− anions into a layer structure. A three-dimensional coordination network is formed by O—H...N and O—H...O hydrogen bonding.

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The water-coordinated Ca atom in the layer structure of the title compound, [Ca(C10H8O6)(H2O)2]n, is connected to a carboxyl O atom of one —O—CH2—CO2 arm of the di­carboxyl­ate dianion; it is also linked to an O atom of a carboxyl­ate group of this arm of an adjacent dianion, as well as to the O atoms of the other arm of two different dianions. The six-coordinate octahedral geometry is distorted, owing to a weak interaction with the ether O atom of one of the arms; the dianion functions in a μ4-bridging mode.

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In the title coordination polymer {systematic name: catena-poly­[[di­aqua­cadmium(II)]-μ-p-phenyl­enebis­(oxy­acetato)-κ4O,O′:O′′,O′′′]), [Cd(C10H8O6)(H2O)2]n, the CdII atom displays a trigonal prismatic coordination geometry, involving four carboxyl O atoms from two different benzene-1,4-dioxy­acetate ligands and two water mol­ecules. The CdII atom and the benzene-1,4-dioxyacetate ligand lie on special positions with twofold rotation and inversion symmetry, respectively. Adjacent CdII ions are linked by carboxyl­ate groups with the tetradentate coordination mode, forming a one-dimensional chain structure with an adjacent Cd...Cd distance of 15.263 (5) Å. These chains are further linked by O—H...O hydrogen bonds, forming a supramolecular network.

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In the title one-dimensional polymer, [Zn(C9H6O5)(C7H6N2)2]n, the ZnII center exhibits a deformed tetrahedral coordination geometry defined by two N atoms from two benz­imidazole mol­ecules and two carboxyl O atoms from two different 4-carboxy­phenoxy­acetate groups. Each 4-carboxy­phenoxy­acetate ligand acts in a bis-monodentate mode to connect two adjacent ZnII ions, forming a chain structure. Hydrogen bonds serve to connect the chains into a two-dimensional supramolecular network.

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The CoII atom in the title coordination polymer, [Co(C9H6O5)(C12H8N2)(H2O)]n, displays a distorted octahedral geometry defined by three carboxyl O atoms from two independent 4-carboxy­phenoxy­acetate groups, two N atoms from one 1,10-phenanthroline mol­ecule and one water mol­ecule. The CoII atoms are bridged by carboxyl­ate groups in monodentate and bidentate modes, forming a chain structure. Adjacent polymeric chains are connected via hydrogen-bond interactions into a double-chain structure. Furthermore, these chains are stacked through π–π interactions to construct a two-dimensional supramolecular network.

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In the title coordination polymer, [Cu(1,4-BDOA)(2,2′-bipy)(H2O)]n (where 1,4-BDOA2− is benzene-1,4-dioxy­acetate, C10H8O6, and 2,2′-bipy is 2,2′-bipyridine, C10H8N2), each CuII atom is six-coordinate and displays a distorted square-pyramidal geometry, with the basal plane capped by one very long semicoordinate Cu—O bond of 2.920 (3) Å. Adjacent CuII ions are bridged by carboxyl­ate groups, resulting in a one-dimensional chain structure with a shortest Cu...Cu distance of 13.484 (3) Å. Furthermore, these chains are linked through hydrogen bonds and π–π stacking inter­actions to form a supramolecular network.

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In the title coordination polymer, [Mn(4-CPOA)(2,2′-bipy)(H2O)]n [where 4-CPOA2− is 4-carboxyl­ato­phenoxy­acetate (C9H6O5) and 2,2′-bipy is 2,2′-bi­pyridine (C10H8N2)], each MnII ion displays a distorted octahedral coordination configuration, defined by three carboxyl O atoms from two different 4-CPOA2− groups, two N atoms from the 2,2′-bi­pyridine ligand and one water mol­ecule. Adjacent MnII ions are linked by carboxyl­ate groups into a one-dimensional chain structure with a shortest Mn...Mn distance of 9.771 (3) Å. A two-dimensional supramolecular network is constructed through O—H...O intermolecular hydrogen bonds and π–π stacking interactions.

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In the title one-dimensional coordination polymer, [Cd(μ-DPIA)2(H2O)]n (DPIA is the 4,5-di­phenyl­imidazole-1-acetate monoanion, C17H13N2O2), each CdII atom exists in a pentagonal–bipyramidal coordination geometry, defined by four O atoms and two N atoms from two DPIA ligands [Cd—O = 2.389 (4)–2.455 (4) Å and Cd—N = 2.362 (5)–2.372 (5) Å] and one water mol­ecule [Cd—O(water) = 2.313 (2) Å]. Adjacent CdII ions are bridged by DPIA groups, forming an infinite chain structure. The Cd...Cd separation within the polymer is 7.650 (3) Å. The structure is stabilized by weak hydrogen-bonding interactions.

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In the title coordination polymer, [Cd(4-CPOA)(H2O)3]n (where 4-CPOA2− is the 4-carboxyl­ato­phenoxy­acetate dianion, C9H6O5), the CdII ion is seven-coordinate, involving four O atoms of two different 4-CPOA2− ligands and three water mol­ecules, arranged in a pentagonal–bipyramidal geometry. Adjacent CdII ions are linked by the 4-CPOA2− groups in bidentate mode, giving rise to a zigzag chain with a closest Cd...Cd distance of 10.310 (5) Å. The chains are further linked by O—H...O hydrogen bonds to form a supramolecular three-dimensional network.

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The MgII ion and the 1,4-BDOA2− ligand in the title coordination polymer, [Mg(1,4-BDOA)(CH3OH)2]n (where 1,4-BDOA2− is the p-phenyl­enedioxy­diacetate dianion, C10H8O62−), lie on inversion centers. The MgII center has an octa­hedral coordination geometry defined by four carbox­yl O atoms from four different 1,4-BDOA2− ligands and two hydroxy O atoms from two methanol mol­ecules. The MgII atoms are bridged by 1,4-BDOA2− ligands, leading to a three-dimensional infinite network structure.
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