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Two new two-dimensional coordination polymers, poly[[[aqua( 2,2'-bipyridine-κ² N,N')manganese( II ) ]-µ3-p-phenylenebis(oxyacetato)-κ³O:O':O''] dihydrate], [[Man(C10H8O6)(C10H8N2)(H2O)]·2H2O]n, (I), and poly[[did-mu;-aqua-ibis[aqua sodium(I)]]-mu;4-p-phenylenebis( oxyacetato )-κO: O', O'' : O''',O'''':O'''''], [Na2(C10H8O6)(H2O)4]n, have been synthesized and characterized by X-ray single-crystal diffraction. In (I), there are two 1,4-BDOA2- [p-phenylenebis(oxyacetate) or, more commonly, benzene-1,4-dioxyacetate] ligands, each lying about inversion centres, while in (II), there is one such ligand and it also has crystallographically imposed inversion symmetry. In (I), each MnII atom displays an octahedral MnN2O4 configuration, defined by three carboxyl O atoms of different 1,4-BDOA2- groups, two N atoms of one 2,2'-bipyridine ligand and one water molecule. In (II), each NaI atom is octahedrally coordinated by one ether O atom, two carboxyl O atoms of different 1,4-BDOA2- ligands and three water molecules. The metal ions in complexes (I) and (II) are bridged by 1,4-BDOA2- groups into twodimensional layer structures. Furthermore, three-dimensional supramolecular networks are constructed via hydrogen bonds in (I) and (II), and by additional π-π stacking interactions in (I). [ABSTRACT FROM AUTHOR]

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. [ABSTRACT FROM AUTHOR]

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. [ABSTRACT FROM AUTHOR]

In the title two-dimensional coordination polymer, [Mn(1,4BDOA)(4,4-bipy)(H2O)2]n [1,4-BDOA2- is the p-phenylenedioxydiacetate dianion (C10H8O6) and 4,4-bipy is 4,4-bipyridine (C10H8N2)], each MnII atom displays octahedral coordination by two O atoms of the 1,4-BDOA2- groups, two N atoms of the 4,4-bipy ligands and two solvent water molecules. The MnII atom, 4,4-bipy ligand and 1,4-BDOA2- group occupy different inversion centres. Adjacent MnII atoms are bridged by 1,4-BDOA2- groups and 4,4-bipy ligands, forming a two-dimensional network with Mn···Mn separations of 11.592 (2) and 11.699 (2) Å. Hydrogen bonds from a water O-H group link the layers in the third dimension. [ABSTRACT FROM AUTHOR]

The carboxyl­ate dianion in the polymeric title compound, [Zn(C9H6O5)(H2O)2] n, which is disordered over a centre of inversion, links diaqua­zinc(II) units into a zigzag chain; the chains interact through hydrogen bonds to form layers. The six-coordinate metal atom lies on a special position of site symmetry 2. [ABSTRACT FROM AUTHOR]

In the title compound, [Mg(H2O)6](C7H6NO3)2·2H2O, the MgII atom lies on a centre of symmetry and is coordinated by six water mol­ecules in an octahedral geometry. A three-dimensional supramolecular framework is formed via O—H⋯O hydrogen bonds between the anions and cations. [ABSTRACT FROM AUTHOR]

In the title coordination polymer, [Ca(2-OPA)2(H2O)2] n [2-OPA− is 2-oxo-1,2-di­hydro­pyridine-1-acetate, C7H6NO3], the Ca atom is eight-coordinated by six O atoms from four 2-OPA− ligands and two water mol­ecules, and displays a dodecahedral coordination geometry. Each 2-OPA− ligand bridges two adjacent Ca atoms, forming a chain along the a-axis direction. The Ca⋯Ca separation within the polymer is 4.1022 (8) Å. A two-dimensional supramolecular framework is further constructed by hydrogen bonds and weak π–π stacking interactions. [ABSTRACT FROM AUTHOR]

In the title coordination polymer, {[Ni(4-CPOA)(phen)(H2O)2]·H2O}n (phen is 1,10-phenanthroline, C12H8N2; 4-CPOA is the 4-carboxy­phenoxy­acetate dianion, C9H6O5), each NiII ion displays a distorted octa­hedral geometry, defined by two carboxyl O atoms from two different 4-CPOA ligands, two N atoms from one phen mol­ecule and two coordinated water mol­ecules. The NiII ions are bridged by carboxyl­ate groups of 4-CPOA to form a chain structure. Adjacent polymeric chains are connected via hydrogen bonds and π–π stacking to construct a three-dimensional supramolecular network. [ABSTRACT FROM AUTHOR]

One of the two independent Zn atoms of the polymeric title compound, [Zn3(C16H10O4)3(C10H8N2)] n, lies on a special position of site symmetry 3 and the other on a special position of site symmetry . The carboxylate ends of the 4,4′-(ethene-1,2-di­yl)dibenzoate dianion, which lies on a special position of site symmetry , each bridge these two independent Zn atoms. The bipyridine-coordinated Zn atom on the threefold axis has a tetra­hedral geometry, whereas the other Zn atom is coordin­ated by the O atoms of six different dianions in an octa­hedral geometry. [ABSTRACT FROM AUTHOR]

One of the two independent Mn atoms of the polymeric title compound, [Mn3(C16H10O4)3(H2O)2] n, lies on a special position of 3 site symmetry and the other on a special position of site symmetry. One end of the 4,4′-(ethene-1,2-diyl)dibenzoate dianion bridges the two independent Mn atoms. The water-coordinated Mn atom on the threefold axis is linked to the O atoms of three dianions in a tetra­hedral environment. The Mn atom is linked to the O atoms of six different dianions in an octa­hedral geometry. [ABSTRACT FROM AUTHOR]

One of the two independent Cd atoms of the polymeric title compound, [Cd3(C16H10O4)3(H2O)2] n, lies on a special position of 3 site symmetry and the other on a special position of site symmetry. The compound adopts a carboxyl­ate-bridged layer structure. [ABSTRACT FROM AUTHOR]

The title compound, C7H7NO3·2H2O, exists as a betaine. The O atoms of the hydr­oxy and carboxyl­ate groups of 3-hydroxy­pyridinium-1-acetate inter­act with water mol­ecules to form a three-dimensional hydrogen-bonded supramol­ecular network. [ABSTRACT FROM AUTHOR]

In the title one-dimensional polymer, {[Zn(3-CPOA)(C3H4N2)2]·3H2O} n (3-CPOA2− is the 3-carboxyl­atophenoxy­acetate dianion, C9H6O5), the Zn atom shows tetra­hedral coordination, as it is linked to two N atoms from two imidazole mol­ecules and two carboxyl­ate O atoms from two different 3-CPOA2− groups. Adjacent Zn atoms are linked by 3-CPOA2− ligands into a helical chain. The chains are linked into a three-dimensional network by hydrogen bonds. [ABSTRACT FROM AUTHOR]

In the crystal structure of the title complex, [Cu2(C8H7O2)4(C3H7NO)2], two independent dinuclear CuII complex mol­ecules, bridged by phenyl­acetate anions, are located on inversion centres. The Cu⋯Cu separations of 2.6414 (8) and 2.6261 (8) Å suggest no bonding between the Cu atoms. The CuII ions exist in a square-pyramidal coordination environment, defined by one N, N-dimethyl­formamide and four phenyl­acetate O atoms. [ABSTRACT FROM AUTHOR]

In the title complex, [Co(C16H10O4)(C12H8N2)(H2O)2]n, the CoII ion exists in an octahedral geometry, coordinated by two N atoms of a 1,10-phenanthroline ligand, two carboxylate O atoms of two different transstilbene-4,4′-dicarboxylate ligands and two water molecules. The trans-stilbene-4,4′-dicarboxylate bridges give rise to a linear chain structure. These chains are further interconnected through intermolecular hydrogen bonds and π-π stacking interactions between one of the rings of the 1,10-phenanthroline ligand and a symmetry-related ring [centroid-to-centroid distance 3.6153 (8) Å], to form a three-dimensional supramolecular network. [ABSTRACT FROM AUTHOR]

In the title complex, [Cd(C4O4)(C10H8N2)]n, the Cd atom exists in a trigonal-prismatic geometry that is defined by the two N atoms of a 1,10-phenanthroline ligand and the four carboxylate O atoms of two different acetylenedicarboxylate dianions. Adjacent Cd atoms are bridged by acetylenedicarboxylate dianions, giving rise to a two-dimensional structure parallel to (100). [ABSTRACT FROM AUTHOR]

In the title complex, [Mn(C4O4)(C12H8N2)(H2O)2] n, each MnII ion is octa­hedrally coordinated by two N atoms of a 1,10-phenanthroline ligand, two carboxylate O atoms of different acetyl­enedicarboxyl­ate (ace2−) ligands and two coordinated water mol­ecules, and the octa­hedral units are connected by ace2− bridges, which adopt a bis-monodentate coordination mode, to form a one-dimensional structure along the [101] direction. A three-dimensional supra­molecular architecture is constructed via hydrogen-bond and π–π inter­actions. [ABSTRACT FROM AUTHOR]

In the title complex, {[Ni(C16H10O4)(C12H8N2)(H2O)]·H2O} n, the NiII ion is in a distorted octa­hedral geometry and coordinated by two N atoms of a 1,10-phenanthroline (phen) ligand, three carboxylate O atoms of two different bpea2− ligands and one water mol­ecule. The [Ni(phen)H2O] units are connected by two different 4,4′-(ethene-1,2-di­yl)dibenzoate (bpea2−) bridges, forming a one-dimensional zigzag chain structure. One bpea2− ligand coordinates to Ni in a bis-monodentate fashion, while the other acts as a bis-bidentate chelate. [ABSTRACT FROM AUTHOR]

In the mononuclear title complex, [Ag(NO3)(3-PyOH)2] (3-PyOH = 3-hydroxy­pyridine, C5H5NO), the AgI atom shows a linear geometry defined by two N atoms of the 3-PyOH ligands, and the NO3− anion inter­acts with the AgI atom in a chelating mode through very weak Ag⋯O bonds. A three-dimensional supramolecular framework is formed by both hydrogen bonds and π–π inter­actions. [ABSTRACT FROM AUTHOR]

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. [ABSTRACT FROM AUTHOR]

In the title complex {systematic name: aqua­[ p-phenyl­enebis­(dioxy­acetato)-κ O]­tetrakis(1 H-imidazole-κ N3)­nickel(II) mono­hydrate}, [Ni(C10H8O6)(C3H4N2)4(H2O)]·H2O, the NiII atom shows a distorted octahedral configuration, defined by one carboxyl O atom of the benzene-1,3-dioxy­acetate group, four N atoms from four imidazole ligands and one water mol­ecule. A three-dimensional supramolecular network is constructed by hydrogen-bonding and π–π stacking interactions. [ABSTRACT FROM AUTHOR]

Each seven-coordinate CdII atom in the title coordination polymer, poly­[[bis(1 H-imidazole-κ N3)­cadmium(II)]-μ3- m-phenyl­enebis­(oxy­acetato)], [Cd(1,3-BDOA)(C3H4N2)2] n (1,3-BDOA2− is the benzene-1,3-dioxy­acetate dianion, C10H8O6), displays a distorted monocapped octahedral coordination geometry, defined by two N atoms from the imidazole ligands and five O atoms from three 1,3-BDOA2− anions. Adjacent CdII atoms are bridged by two 1,3-BDOA2− ligands, forming a one-dimensional double-chain structure, with Cd⋯Cd separations of 4.014 (3) Å across the double chain and 13.105 (2) Å along the chain. A network of N—H⋯O interchain hydrogen bonds is also present. [ABSTRACT FROM AUTHOR]

In the title coordination polymer, [Cu(HIDC)(1,10-phen)] n (HIDC2− is the 4-carboxy­imidazole-5-carboxyl­ate dianion, C5H2N2O42−, and 1,10-phen is 1,10-phenanthroline, C12H8N2), the CuII atom shows a distorted octahedral coordination configuration, defined by two N atoms from a terminal 1,10-phen mol­ecule, two N atoms and two O atoms from two individual HIDC2− groups. Adjacent CuII atoms are bridged by HIDC2− groups, forming a one-dimensional chain structure. The Cu⋯Cu separation within the polymer is 6.132 (4) Å. The chains are linked into a two-dimensional supramolecular network viaπ–π stacking interactions. [ABSTRACT FROM AUTHOR]

In the title centrosymmetric dinuclear complex, [Cu2(3-CPOA)2(C3H4N2)4]·2H2O (3-CPOA2− is the 3-carboxyl­ato­phenoxy­acetate dianion, C9H6O5), each CuII ion is coordin­ated by three carboxyl O atoms, one ether O atom from two 3–CPOA2− groups and two N atoms from two imidazole co-ligands, displaying an elongated square-pyramidal coordin­ation geometry with a based capped by one very long semicoordinate Cu—Ocarboxyl bond [2.8191 (15) Å]. The two CuII ions are bridged by 3–CPOA2− ligands, generating a macrocyclic ring motif, with a Cu⋯Cu separation of 6.879 (3) Å. The dinuclear motifs are further linked into a two-dimensional supramolecular network via hydrogen-bonding interactions. [ABSTRACT FROM AUTHOR]

In the asymmetric unit of the title compound, [Mn(C10H8O6)(H2O)3] n, the two half-MnII atoms lie on inversion centres. One MnII atom is in an octahedral configuration, defined by two O atoms from two monodentate carboxyl­ate groups and four water mol­ecules, and the other MnII atom exists in a different octahedral coordination environment, defined by four O atoms from four monodentate carboxyl­ate groups and two water mol­ecules. The MnII atoms are bridged by a benzene-1,3-dioxy­acetate dianion in monodentate and bridging-bidentate modes, forming a two-dimensional layer structure. [ABSTRACT FROM AUTHOR]

In the title coordination polymer, [Zn(C9H6O5)(C10H8N2)(H2O)] n, the ZnII ion displays a distorted octahedral coordination configuration, defined by two N atoms from the 2,2′-bi­pyridine ligand, three carboxyl­ate O atoms from two 4-carboxyl­ato­phenoxy­acetate dianions and one water mol­ecule. Adjacent ZnII atoms are linked by carboxyl­ate groups into zigzag chains with a Zn⋯Zn separation of 9.710 (3) Å across the chains. Intermolecular hydrogen bonds serve to assemble the chains into a double-chain structure. [ABSTRACT FROM AUTHOR]

In the title one-dimensional coordination polymer {systematic name: catena-poly­[[[aqua(1,10-phenanthroline-κ2 N, N′)­copper(II)]-μ-phenyl­enebis­(oxy­acetato)-κ2 O: O′] dihydrate]}, {[Cu(C10H8O6)(C12H8N2)(H2O)]·2H2O} n, the CuII atom has a distorted square-pyramidal coordination geometry, defined by two carboxyl O-atom donors from two benzene-1,3-dioxy­acetate groups, two N-atom donors from the 1,10-phenanthroline ligand and one water mol­ecule. The CuII ions are bridged by benzene-1,3-dioxy­acetate dianions (1,3-BDOA2−), resulting in a one-dimensional chain structure. The intrachain Cu⋯Cu separation is 9.769 (4) Å. The chains are linked into a three-dimensional supramolecular network via hydrogen bonds and π–π stacking interactions. [ABSTRACT FROM AUTHOR]

In the title one-dimensional coordination polymer, {[Co(4-CPOA)(3-PyOH)2(H2O)2]·H2O} n [4-CPOA2− is the 4-carboxy­phenoxy­acetate dianion (C9H6O52−) and 3-PyOH is 3-hydroxy­pyridine (C5H5NO)], the CoII atom has a distorted octahedral coordination geometry, defined by two carboxyl O-atom donors from two 4-CPOA2− groups, two N-atom donors from two 3-PyOH co-ligands and two water mol­ecules. The CoII atoms are bridged by bis-monodentate carboxyl­ate groups, forming a one-dimensional chain structure. The Co⋯Co separation within the polymer is 10.862 (3) Å. The chains are linked into a three-dimensional supramolecular network via O—H⋯O hydrogen bonds. [ABSTRACT FROM AUTHOR]

In the title two-dimensional coordination polymer, [Cu(C9H6O5)(C7H6N2)] n, each CuII atom exists in a distorted square-pyramidal coordination environment, defined by one N atom from the terminal benz­imidazole mol­ecule and four carboxyl O atoms derived from three different 3-carboxyl­ato­phenoxy­acetate (3-CPOA) dianions. The tetradentate 3-CPOA ligand forms three bonds to adjacent Cu atoms to form chains that are linked to neighboring chains, via a fourth Cu—O bond, so as to form a layer structure that is further stabilized by hydrogen bonds. [ABSTRACT FROM AUTHOR]

In the title one-dimensional coordination polymer, [Cd(HIDC)(1,10-phen)] n (where HIDC2− is the imidazole-4,5-di­carboxyl­ate dianion, C5H2N2O42−, and 1,10-phen is 1,10-phenanthroline, C12H8N2), the CdII atom has a distorted octahedral coordination geometry, defined by two N donors from a chelating 1,10-phen mol­ecule, two N-atom donors and two O-atom donors from two individual HIDC2− groups. Adjacent CdII ions are bridged by HIDC2− groups, resulting in a one-dimensional chain structure. The Cd⋯Cd separation within the polymer is 6.661 (2) Å. The chains are linked into a two-dimensional supramolecular network viaπ–π stacking interactions. [ABSTRACT FROM AUTHOR]

In the title complex, [Zn(H2IDC)2(H2O)2] (where H2IDC− is the 5-carboxy-1 H-imidazole-4-carboxyl­ate monoanion, C5H3N2O4), the ZnII atom is located on an inversion centre, is trans-coordinated by two N,O-bidentate H2IDC− ligands and two water mol­ecules and shows an approximately octahedral configuration. A three-dimensional supramolec­ular architecture is formed via hydrogen-bond interactions. [ABSTRACT FROM AUTHOR]

The title complex crystallizes as a methanol solvate, [Cu2(C16H14O4N2)2(C5H5N)2]·2CH4O. The dinuclear complex is generated from the atoms of the asymmetric unit by inversion symmetry, resulting in a Cu⋯Cu separation of 3.497 (3) Å. The copper(II) species has a square-pyramidal geometry, with the basal plane defined by two O atoms and one N atom from the hydrazone ligand and a pyridine N atom. The apical site is occupied by a phenolate O atom in the symmetry-generated hydrazone ligand, which also bonds to the second Cu atom. Intramolecular O—H⋯N hydrogen bonds are formed between the methanol solvent mol­ecules and the uncoordinated N atoms of the hydrazone ligand. [ABSTRACT FROM AUTHOR]

In the title complex, [Zn(1,4-BDOA)(H2O)4] n or [Zn(C10H8O6)(H2O)4] n (where 1,4-BDOA2− is the benzene-1,4-dioxy­acetate dianion), the ZnII atom and the 1,4-BDOA2− ligand build up a one-dimensional polymer chain along c. The ZnII atom, located on an inversion center, shows an octahedral coordination geometry, defined by two carboxyl O atoms of different benzene-1,4-dioxy­acetate ligands and four water mol­ecules. Adjacent ZnII atoms are bridged by bis-monodentate carboxyl­ate groups of the centrosymmetric 1,4-BDOA2− ligands, to furnish the one-dimensional chain along the c axis; the Zn⋯Zn separation within the polymer is 14.717 (3) Å. A hydrogen-bonded supramolecular architecture is formed via O—H⋯O intermolecular hydrogen bonds. [ABSTRACT FROM AUTHOR]

The title complex, [Co(2-OPA)2(H2O)4] [2-OPA− = (2-oxo-1,2-dihydropyridin-1-yl)­acetate, C7H6NO], is a neutral mononuclear compound. The CoII atom, located on an inversion center, has an octahedral coordination geometry involving two carbonyl O atoms of different 2-OPA− ligands and four water mol­ecules. A layer structure is formed via O—H⋯O intermolecular hydrogen bonds. [ABSTRACT FROM AUTHOR]

In the title coordination polymer, also called catena-poly­[[aqua­bis(1 H-imidazole-κ N3)copper(II)]-μ-phenyl­ene­dioxy­diacetato-κ2 O:O′], [Cu(1,4-BDOA)(C3H4N2)2(H2O)] n (where 1,4-BDOA2− is benzene-1,4-dioxy­acetate, C10H8O6), the CuII atom is five-coordinate involving two O atoms of the 1,4-BDOA ligand, two N atoms of imidazole ligands and one water mol­ecule, displaying a distorted square-pyramidal coordination geometry. The CuII atoms are bridged by carboxyl­ate groups, forming a one-dimensional zigzag chain. The adjacent Cu⋯Cu distance is 12.656 (5) Å. Furthermore, such chains are linked by hydrogen-bond interactions, resulting in a three-dimensional network. [ABSTRACT FROM AUTHOR]

In the crystal structure of the title 1:1 co-crystal, C7H8NO3+·Cl−·C7H7NO3, of 1-carboxy­methyl-3-hydroxy­pyridinium chloride with 3-hydroxy­pyridinium-1-acetate, the cation interacts with the zwitterion to form a ribbon that runs along the c axis of the orthorhombic unit cell. The Cl− anions lie at the sides of the ribbon. [ABSTRACT FROM AUTHOR]

The hydro­xide group in the centrosymmetric title complex, {[Zn4(C9H6O5)3(OH)2(C10H8N2)2]·2H2O} n, which adopts a three-dimensional network structure, bridges three Zn atoms. One of the symmetry-independent di­carboxyl­ate groups chelates to a Zn—OH—Zn unit through the carboxyl group on the aromatic ring, while its other oxy­acetate arm uses only one O atom for binding. The other di­carboxyl­ate dianion is disordered over a center of inversion and functions as a chelating ligand to two Zn—OH—Zn units. The modes of coordination by the hydro­xide, heterocycle and di­carboxyl­ate ligands give rise to tetrahedral coordination for one Zn atom and octahedral coordination for the other. [ABSTRACT FROM AUTHOR]

Each CuII atom in the title coordination polymer, {[Cu(1,4-BDOA)(phen)(H2O)]·H2O} n [where 1,4-BDOA2− is the benzene-1,4-dioxy­acetate dianion (C10H8O62−) and phen is 1,10-phenanthroline (C12H8N2)], shows a distorted octahedral coordination geometry, defined by three carboxyl O-atom donors from the benzene-1,4-dioxy­acetate ligand, two N-atom donors from the phen ligand and one water mol­ecule. The CuII ions are bridged by carboxyl­ate groups, forming a one-dimensional chain structure. The Cu⋯Cu separation within the polymer is 11.325 (2) Å. Furthermore, the chains are linked into a three-dimensional supramolecular network via hydrogen bonds and π–π stacking interactions. [ABSTRACT FROM AUTHOR]

The title compound, C16H16N2O4·H2O, crystallizes as a monohydrate in which the water mol­ecule forms bifurcated hydrogen bonds to the hydroxyl and methoxy O atoms of the methoxy­salicyl­dehyde portion of the Schiff base. The mol­ecule is approximately planar; hydrogen-bonding interactions involving the amino group and the water mol­ecule give rise to a layer structure. [ABSTRACT FROM AUTHOR]

The Zn atom in the title mononuclear complex, [Zn(C2H3O3)2(C12H8N2)]·2H2O, exists in an octahedral coord­ination environment defined by two hydroxy O atoms, two carboxyl­ate O atoms from different glycolate (hydroxy­acetate) ligands and two N atoms from one phenanthroline (phen) ligand. The Zn atom occupies a special position with twofold symmetry. A layer structure is formed via O—H⋯O hydrogen bonds involving the water molecules. [ABSTRACT FROM AUTHOR]

In the title complex, [CoCl2(C5H5NO)4], the Co atom is in an elongated octahedral environment, defined by two Cl− ions and four N atoms of 3-hydroxy­pyridine ligands. The Co atom lies on a special position with crystallographic twofold rotation symmetry. Individual mol­ecules are linked by intermolecular O—H⋯Cl hydrogen bonds into a layer structure. [ABSTRACT FROM AUTHOR]

In the title centrosymmetric dinuclear complex, [Cu2(C2H3O2)4(C5H5NO)2], the two CuII atoms are bridged by four atetate groups, the Cu⋯Cu separation being 2.6468 (7) Å. Each CuII atom exists in a square-pyramidal coordination environment defined by four carboxyl acetate O atoms and one 4-pyridone O atom. Intermolecular hydrogen bonds give rise to a two-dimensional layer structure. [ABSTRACT FROM AUTHOR]

The article focuses on the crystallization of the compound (4-oxo-1,4-dihydropyridin-1-yl)acetic acid. In the crystal structure the molecules of 4-oxo-1,4-dihydropyridine-1-acetic acid are linked by a short hydrogen bond into a helical chain. The acetate and the oxopyridine moieties are both planar. In the experiment an aqueous solution of 4-hydroxypyridine and sodium hydroxide was reacted with an aqueous solution of chloroacetic acid.

The article focuses on the crystallization of the compound diaqua(nitrato-κ2O,O')bis(4-pyridone-κO)-cobalt (II) nitrate. In the crystal structure the cobalt atom exists in an octahedral environment, defined by four oxygen atoms of two 4-pyridone ligands and a chelating nitrate ion. Carbon bound hydrogen atoms were placed in calculated positions. Pink prismatic crystals of the compound were obtained in the experiment.

The title complex, [Co(H2O)6](C7H6NO3)2·2H2O, was synthesized by the reaction of Co(CH3COO)2·4H2O and 4-oxo-4 H-pyridine-1-acetic acid in an aqueous solution. The cobalt(II) ion, which lies on a center of symmetry, is coordinated by six water mol­ecules to form an octahedron [Co—O = 2.077 (1)–2.084 (1) Å]. A three-dimensional supramolecular framework is formed via O—H⋯O hydrogen bonds between the anions and cations. [ABSTRACT FROM AUTHOR]

The title complex, tetraaquabis[(2-oxo-1,2-dihydropyridin-1-yl)acetato]magnesium(II), [Mg(C7H6NO3)2(H2O)4], is a neutral mononuclear mol­ecule consisting of an MgII ion, two (2-oxo-4 H-pyridin-1-yl)­acetate ligands and four coordinated water mol­ecules. The MgII atom, located on a symmetry center, has octahedral coordination involving two carbonyl O atoms of different (2-oxo-4 H-pyridin-1-yl)­acetate ligands and four water mol­ecules. O—H⋯O intermolecular hydrogen bonds form a layer structure. [ABSTRACT FROM AUTHOR]

The FeIII atom in the title complex, [Fe(H L)Cl2(CH3OH)]·CH3OH, [H2 L = 3-methoxy­salicyl­aldehyde (4-methoxy­benzoyl)­hydrazone, C16H15N2O4], is coordinated by two O atoms and one N atom of the tridentate hydrazone ligand, two chloride anions and one methanol mol­ecule, thus defining a distorted octahedral geometry. A chain structure is constructed by hydrogen-bond interactions. [ABSTRACT FROM AUTHOR]

In the title complex, [Zn(C11H12N3O2)(C2H3O2)(C9H7N)]·0.5C9H7N, the ZnII atom is five-coordinate, bonded to one acetate O atom, one O atom and two N atoms from the tridentate hydrazone H L− ligand (H2 L is di­acetyl monoxime benzoyl­hydrazone), and one N atom from the quinoline mol­ecule. The uncoordinated quinoline mol­ecule is disordered and lies on a center of inversion. The presence of π–π stacking interactions between the coordinated quinoline ligands results in a chain structure along the a axis. [ABSTRACT FROM AUTHOR]

The title complex, [Cr(H2O)6][Na(C10H8O6)2(H2O)3]·5H2O (C10H8O6 = benzene-1,3-dioxy­acetate), consists of [Na(C10H8O6)2(H2O)3]3− trianions, [Cr(H2O)6]3+ trications and five uncoordinated water mol­ecules. The Cr cation has six-coordinate slightly distorted octahedral geometry, whereas the Na-ion coordination is distorted trigonal prismatic. The cations, anions and water molecules are linked by O—H⋯O intermolecular hydrogen bonds into a three-dimensional network. [ABSTRACT FROM AUTHOR]

In the title compound, [Zn(C2H3O2)(C11H12N3O2)(C3H4N2)], the Zn atom is five-coordinate in a ZnN3O2 trigonal-bipyramidal enviroment. Adjacent mol­ecules are linked by an intermolecular hydrogen bond into a chain running along the a axis of the monoclinic cell. [ABSTRACT FROM AUTHOR]