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Poly[(?(5)-2,2'-bipyridine-5,5'-dicarboxyl-ato)lead(II)].

ABSTRACT: In the title polymeric compound, [Pb(C(12)H(6)N(2)O(4))](n), the Pb(II) cation, located on a mirror plane, is N,N'-chelated by a 2-2'-bipyridine-5,5'-dicarboxyl-ate (bpdc) anion and is further coordinated by six O atoms from four carboxyl groups of bpdc anions in an irregular N(2)O(6) geometry. The carboxylate groups bridge the Pb(II) cations, forming a three-dimensional polymeric structure. The carboxyl-ate group is twisted away from the attached pyridine ring by 11.4?(3)°.

SUBMITTER: Sertcelik M

PROVIDER: S-EPMC3435613 | BioStudies | 2012-01-01T00:00:00Z

REPOSITORIES: biostudies

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Tetra-aqua-(2,2'-bipyridine-5,5'-dicarboxyl-ato-?N,N')nickel(II) dihydrate.

Project description:In the title compound, [Ni(C(12)H(6)N(2)O(4))(H(2)O)(4)]·2H(2)O, obtained from a basic solution of 2,2'-bipyridine-5,5'-dicarboxyl-ate and nickel(II) chloride in water, the central Ni(II) cation (site symmetry 2) is coordinated by two N atoms from the 2,2'-bipyridine-5,5'-dicarboxyl-ate ligand and four aqua O atoms. The N-Ni-N angle is 78.64?(8)°. Weak but significant ?-? stacking inter-actions exist between the pyridine rings with a centroid-centroid distance of 3.652?(8)?Å. In addition, four O atoms of the two carboxyl groups form hydrogen bonds with both coordinated and uncoordinated water mol-ecules, forming an infinite three-dimensional network.

1000-01-01 | S-EPMC2970486 | BioStudies

Poly[(?(4)-biphenyl-2,4'-dicarboxyl-ato-?(5)O(2):O(2'):O(4):O(4),O(4'))zinc].

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1000-01-01 | S-EPMC3470155 | BioStudies

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Project description:The title compound, {[K(2)(C(12)H(6)N(2)O(4))(H(2)O)(2)]·2H(2)O}(n), forms a three-dimensional coordination polymer in the solid state. The asymmetric unit consists of one K(+) ion, half of a 2,2'-bipyridyl-5,5'-dicarboxyl-ate ligand, one coordinated water mol-ecule and one solvent water mol-ecule. The K(+) ion is 7-coordinated by the oxygen atoms of two water mol-ecules and by five oxygen atoms of four carboxyl-ate groups, one of which is chelating. The extended structure can be described as a binodal network in which each K(+) is a six-connected node, bonding to four carboxyl-ate groups and two bridging water mol-ecules, and the 2,2'-bipyridyl-5,5'-dicarboxyl-ate linkers are eight-connected nodes, with each carboxyl-ate group bridging four metal centers. Overall, this arrangement generates a complex network with point symbol {3(4).4(12).5(12)}{3(4).4(4).5(4).6(3)}(2). Both of the bridging water mol-ecules participate as donors in hydrogen-bonding inter-actions; one to solvent water mol-ecules and a second to an oxygen atom of a carboxyl-ate group.

2009-01-01 | S-EPMC2970491 | BioStudies

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Project description:In the title coordination polymer, [Pb(C(7)H(3)NO(4))](n), the Pb(II) ion is eight-coordinated in a distorted square-anti-prismatic geometry formed by one pyridine N atom and seven carboxyl-ate O atoms from four pyridine-2,3-dicarboxyl-ate (pda) anions. In the pda anion, the dihedral angles between the pyridine ring and carboxyl-ate groups are 19.5?(6) and 73.3?(6)°. The carboxyl-ate groups of the pda anions bridge the Pb ions, forming a two-dimensional coordination polymer parallel to (100). Weak inter-molecular C-H?O hydrogen boning is present in the crystal structure.

2011-01-01 | S-EPMC3051456 | BioStudies

Bis(?-biphenyl-2,2'-dicarboxyl-ato)bis-[(2,2'-bipyridine)copper(II)].

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Project description:In the title complex, {[Mn(C(14)H(6)O(6)S)(C(2)H(6)O(2))(H(2)O)(2)]·C(4)H(9)NO}(n), the Mn(II) ion is six-coordinated in a trans-octa-hedral geometry by two carboxyl-ate O atoms from two 5,5-dioxodibenzo[b,d]thio-phene-3,7-dicarboxyl-ate (L) ligands in a monodentate mode, two O atoms from two ethyl-ene glycol (EG) mol-ecules and two aqua O atoms. The metal ions are linked by the EG and L ligands, forming two-dimensional coordination networks, which are associated into the three-dimensional structure through O-H?O hydrogen bonds.

1000-01-01 | S-EPMC3011537 | BioStudies

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Project description:In the title compound, {[Ag(C(10)H(14)N(4))(H(2)O)](C(14)H(8)O(4))(0.5)·2H(2)O}(n), the Ag(I) ion is three-coordinated by two N atoms from two independent 1,1'-(butane-1,4-di-yl)di-1H-imidazole (BBI) ligands and one water O atom in a distorted T-shaped coordination geometry. The biphenyl-4,4'-dicarboxyl-ate (BPDC) dianions do not coordinate to Ag(I) ions but act as counter-ions. The Ag(I) ions are linked by BBI ligands, forming a zigzag chain. These chains are linked into a two-dimensional supra-molecular architecture by O-H?O hydrogen-bonding inter-actions between water mol-ecules and carboxyl-ate O atoms of the BPDC dianions.

1000-01-01 | S-EPMC2971936 | BioStudies

Poly[(?(2)-4,4'-bipyridine-?N:N')(?(2)-2,2-dimeth-yl-cyclo-pentane-1,3-dicarboxyl-ato-?O,O:O,O)cadmium].

Project description:In the title polymeric compound, [Cd(C(9)H(12)O(4))(C(10)H(8)N(2))](n), the Cd(II) atom is located on a twofold rotation axis and is coordinated by two 4,4'-bipyridine ligands and two 2,2-dimethyl-cyclo-pentane-1,3-dicarboxyl-ate ions. The carboxyl-ate ion and the N-heterocycle both function as bridges to link adjacent Cd(II) atoms to result in the formation of a layer structure parallel to (010). The mid-point of the central C-C bond of the 4,4'-bipyridine ligand is located on an inversion center. In the crystal, the carboxyl-ate ion is disordered over a twofold rotation axis in respect of its methyl group and the cyclo-pentane ring.

1000-01-01 | S-EPMC3247004 | BioStudies

Poly[?-aqua-diaqua-(?(2)-pyrazine-2,3-dicarboxyl-ato)dilithium(I)].

Project description:The asymmetric unit of the title compound, [Li(2)(C(6)H(2)N(2)O(4))(H(2)O)(3)](n), consists of two independent Li(+) cations, one pyrazine-2,3-dicarboxyl-ate dianion and three water mol-ecules. One of the Li(+) cations has a distorted tetra-hedral geometry, coordinated by one of the carboxyl-ate O atoms of the pyrazine-2,3-dicarboxyl-ate ligand and three O atoms from three water mol-ecules, whereas the other Li(+) cation has a distorted trigonal-bipyramidal geometry, coordinated by a carboxyl-ate O atom of a symmetry-related pyrazine-2,3-dicarboxyl-ate ligand, two water mol-ecules and a chelating pyrazine-2,3-dicarboxyl-ate ligand (by utilizing both N and O atoms) of an adjacent mol-ecule. The synthesis of a hydrated polymeric dinuclear lithium complex formed with two pyrazine-2,3-dicarboxylic acid ligands has been reported previously [Tombul et al. (2008a ?). Acta Cryst. E64, m491-m492]. By comparision to the complex reported here, the dinuclear complex formed with two pyrazine-2,3-dicarboxylic acid ligands differs in the coordination geometry of both Li atoms. The crystal structure further features O-H?O and O-H?N hydrogen-bonding inter-actions involving the water mol-ecules and carboxyl-ate O atoms.

1000-01-01 | S-EPMC2971803 | BioStudies

Diaqua-(2,2'-bipyridine-5,5'-dicarboxyl-ato-?N,N')(ethyl-enediamine-?N,N')copper(II) 2.5-hydrate.

Project description:In the mol-ecule of the title compound, [Cu(C(12)H(6)N(2)O(4))(C(2)H(8)N(2))(H(2)O)(2)]·2.5H(2)O, the Cu(II) atom is six-coordinated in a distorted octa-hedral configuration by two N atoms from a 2,2'-bipyridine-5,5'-dicarboxyl-ate anion, two N atoms from ethyl-enediamine and two O atoms from two water mol-ecules. There are also two and a half water mol-ecules in the asymmetric unit. The planar five-membered ring is nearly coplanar with the adjacent pyridine rings, while the other five-membered ring adopts a twisted conformation, probably due to hydrogen bonding. In the crystal structure, intra- and inter-molecular N-H?O and O-H?O hydrogen bonds link the mol-ecules.

1000-01-01 | S-EPMC2959425 | BioStudies

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