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Catena-Poly[[diaquazinc(II)]-?-trans-4,4'-diazenediyldibenzoato-?O,O':O'',O'''].

ABSTRACT: The title compound, [Zn(C(14)H(8)N(2)O(4))(H(2)O)(2)](n), consists of zigzag chains of Zn atoms bridged by azobenzene-4,4'-dicarboxyl-ate ligands. The Zn(II) atom, lying on a twofold rotation axis, is coordinated by four O atoms from the carboxyl-ate groups and two water mol-ecules, giving rise to a considerably distorted octa-hedral coordination envionment. The ligand lies on an inversion center. In the crystal structure, ?-? inter-actions between the ligands [inter-planar distance = 3.527?(3)?Å] assemble the chains into a sheet-like structure. O-H?O hydrogen bonds between the coordinated water mol-ecules and carboxyl-ate O atoms connect the sheets into a three-dimensional network.

SUBMITTER: Liu B

PROVIDER: S-EPMC2977570 | BioStudies | 2009-01-01T00:00:00Z

REPOSITORIES: biostudies

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Diaqua-bis(4-bromo-benzoato-?O,O')zinc(II).

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2008-01-01 | S-EPMC2960796 | BioStudies

Poly[[triaqua-[?(4)-N-(4-carboxyl-ato-phenyl)-iminodiacetato]sodium(I)zinc(II)] dihydrate].

Project description:In the title coordination polymer, {[NaZn(C(11)H(8)NO(6))(H(2)O)(3)]·2H(2)O}(n), the Zn atom is coordinated in a distorted tetra-hedral environment by three carboxyl-ate O atoms from two (4-carboxyl-atophenyl-imino)diacetate ligands and one water mol-ecule; the Na atom is in an distorted octa-hedral coordination environment formed by four carboxyl-ate O atoms from three (4-carboxyl-atophenyl-imino)diacetate ligands and two water mol-ecules. The Zn atoms and Na atoms are linked by (4-carboxyl-atophenyl-imino)diacetate ligands into a three-dimensional framework; the uncoordinated water mol-ecules fill the voids of the skeleton and stabilize it by O-H?O hydrogen bonds.

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catena-Poly[[[aqua-bis-(4,4'-bipyridine-?N)zinc]-?-l-tyrosinato-?N,O:O] nitrate dihydrate].

Project description:In the title compound, {[Zn(C(9)H(10)NO(3))(C(10)H(8)N(2))(2)(H(2)O)]NO(3)·2H(2)O}(n), the Zn(II) atom is six-coordinated in a distorted octa-hedral geometry by two carboxyl-ate O atoms and one amino N atom from two l-tyrosinate ligands, two N atoms from two 4,4'-bipyridine ligands, and one water mol-ecule. Adjacent Zn atoms are bridged by the bidentate carboxyl-ate groups into a cationic chain extending along [010]. N-H?N, O-H?N and O-H?O hydrogen bonds link the cationic chains, nitrate anions and uncoordinated water mol-ecules into a supra-molecular network. ?-? inter-actions between the pyridine rings and between the pyridine and benzene rings [centroid-centroid distances = 3.615?(4) and 3.636?(4)?Å] are present.

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Project description:The title coordination polymer, poly[[?-aqua-tri-aqua-(?3-benzene-1,3,5-tri-carboxyl-ato)sodiumzinc] sesquihydrate], {[NaZn(C9H3O6)(H2O)4]·1.5H2O} n , was obtained in ionic liquid microemulsion at room temperture by the reaction of benzene-1,3,5-tri-carb-oxy-lic acid (H3BTC) with Zn(NO3)2·6H2O in the presence of NaOH. The asymmetric unit comprises two Na(+) ions (each located on an inversion centre), one Zn(2+) ion, one BTC ligand, four coordinating water mol-ecules and two solvent water molecules, one of which is disordered about an inversion centre and shows half-occupation. The Zn(2+) cation is five-coordinated by two carboxyl-ate O atoms from two different BTC ligands and three coordinating H2O mol-ecules; the Zn-O bond lengths are in the range 1.975?(2)-2.058?(3)?Å. The Na(+) cations are six-coordinated but have different arrangements of the ligands: one is bound to two carboxyl-ate O atoms of two BTC ligands and four O atoms from four coordinating H2O mol-ecules while the other is bound by four carboxyl-ate O atoms from four BTC linkers and two O atoms of coordinating H2O mol-ecules. The completely deprotonated BTC ligand acts as a bridging ligand binding the Zn(2+) atom and Na(+) ions, forming a layered structure extending parallel to (100). An intricate network of O-H?O hydrogen bonds is present within and between the layers.

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Diaqua-bis(3,7-dichloro-quinoline-8-carboxyl-ato)zinc(II) monohydrate.

Project description:In the title compound, [Zn(C(10)H(4)Cl(2)NO(2))(2)(H(2)O)(2)]·H(2)O, the Zn atom has a distorted square-pyramidal geometry comprising two O atoms and one N atom from two distinct 3,7-dichloro-quinoline-8-carboxyl-ate ligands, and two water mol-ecules. The free water mol-ecules are involved in inter-molecular O-H?O hydrogen bonding with the coordinated water mol-ecules and carboxyl-ate O atoms, to give a one-dimensional helical chain along the [100] direction.

1000-01-01 | S-EPMC2960553 | BioStudies

trans-Diaqua-bis(6-methoxycarbonyl-pyridazine-3-carboxyl-ato-?N,O)zinc(II) dihydrate.

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Poly[[nona-aqua-bis-(?-5-hy-droxy-benzene-1,3-di-carboxyl-ato)(5-hy-droxy-benzene-1,3-di-carboxyl-ato)dicerium(III)] hexa-hydrate].

Project description:In the title coordination polymer, {[Ce2(C8H4O5)3(H2O)9]·6H2O} n , the asymmetric unit is formed by two Ce(III) atoms, three 5-hy-droxy-benzene-1,3-di-carboxyl-ate ligands, nine coordinating water mol-ecules and six water mol-ecules of crystallization. The two Ce(III) atoms are bridged by 5-hy-droxy-benzene-1,3-di-carboxyl-ate ligands acting in a bis-bidentate coordination mode, generating infinite chains along [101]. Both independent metal atoms are nine-coordinated, one by four O atoms from the carboxyl-ate groups of two bridging 5-hy-droxy-benzene-1,3-di-carboxyl-ate ligands and five O atoms from water mol-ecules, generating a tricapped trigonal-prismatic geometry. The coordination around the second Ce(III) atom is similar, except that one of the water mol-ecules is replaced by an O atom from an additional 5-hy-droxy-benzene-1,3-di-carboxyl-ate ligand acting in a monodentate coordination mode and forming a capped square-anti-prismatic geometry.

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Poly[[tetra-aqua-(?(6)-2,2'-diiodo-biphenyl-4,4',5,5'-tetra-carboxyl-ato)dizinc(II)] dihydrate].

Project description:In the title compound, {[Zn(2)(C(16)H(4)I(2)O(8))(H(2)O)(4)]·2H(2)O}(n), two crystallographically independent Zn(II) atoms are each located on a twofold rotation axis. Both Zn(II) atoms are in distorted octa-hedral coordination geometries: one is coordinated by six O atoms from four carboxyl-ate groups, while the other is coordinated by two carboxyl-ate groups and four water mol-ecules. The tetra-carboxyl-ate ligand mol-ecules connect the Zn(II) atoms, completing a three-dimensional metal-organic framework. O-H?O hydrogen bonds link the metal-organic framework with the uncoord-inated water mol-ecules.

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catena-Poly[[diaqua-strontium]-bis-(?-quinoline-3-carboxyl-ato)].

Project description:The title compound, [Sr(C(10)H(6)NO(2))(2)(H(2)O)(2)](n), contains an eight-coordinate Sr(II) ion displaying a distorted square-anti-prismatic geometry, two quinoline-3-carboxyl-ate ligands and two terminal water mol-ecules. The Sr(II) atom is surrounded by six carboxyl-ate O atoms from four separate quinoline-3-carboxyl-ate ligands and two O atoms from two coordinated water mol-ecules. The bridging carboxyl-ate O atoms [Sr-O = 2.498?(3) and 2.495?(3)?Å] link Sr(II) atoms, forming a chain substructure extending along the c axis. The chains are linked by O-H?N and O-H?O hydrogen bonds, giving a three-dimensional framework structure.

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