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Bis(?(3)-pyrimidine-4-carboxyl-ato)bis-(?(2)-pyrimidine-4-carboxyl-ato)tetra-kis-(aqua-lithium).

ABSTRACT: The asymmetric unit of the title compound, [Li(4)(C(5)H(3)N(2)O(2))(4)(H(2)O)(4)], contains two symmetry-independent Li(I) ions, two symmetry-independent ligands and two symmetry-independent coordinated water mol-ecules. They form a dinuclear unit in which the two Li(I) ions are bridged by two carboxyl-ate O atoms from the two ligands. Two dinuclear units related by an inversion centre form the tetra-meric mol-ecule. One of the Li(I) ions shows a distorted tetra-hedral coordination geometry, the other a distorted trigonal-bipyramidal environment. The tetra-mers are held together by hydrogen bonds in which coordinated water mol-ecules act as donors, and the carboxyl-ate O atoms act as acceptors. A hydrogen bond between coordinated water molecule as donor and a ring N atom as acceptor is also observed.

SUBMITTER: Starosta W

PROVIDER: S-EPMC3414128 | biostudies-literature | 2012 Aug

REPOSITORIES: biostudies-literature

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Bis(μ(3)-pyrimidine-4-carboxyl-ato)bis-(μ(2)-pyrimidine-4-carboxyl-ato)tetra-kis-(aqua-lithium).

Starosta Wojciech W Leciejewicz Janusz J

Acta crystallographica. Section E, Structure reports online 20120714 Pt 8

The asymmetric unit of the title compound, [Li(4)(C(5)H(3)N(2)O(2))(4)(H(2)O)(4)], contains two symmetry-independent Li(I) ions, two symmetry-independent ligands and two symmetry-independent coordinated water mol-ecules. They form a dinuclear unit in which the two Li(I) ions are bridged by two carboxyl-ate O atoms from the two ligands. Two dinuclear units related by an inversion centre form the tetra-meric mol-ecule. One of the Li(I) ions shows a distorted tetra-hedral coordination geometry, the ...[more]

PMID: 22904735

Similar Datasets

catena-Poly[[tetra-aqua-?-aqua-bis-(?(4)-pyrimidine-2-carboxyl-ato)tetra-lithium] dichloride].

Project description:The asymmetric unit of the title compound, [Li(4)(C(5)H(3)N(2)O(2))(2)(H(2)O)(5)]Cl(2), contains two Li(I) cations, one with a distorted trigonal-bipyramidal and the other with a distorted tetra-hedral coordination geometry. Two symmetry-related asymmetric units constitute a building block of the structure, in which both ligand carboxyl-ate O atoms are bidentate and bridge the metal ions, forming a divalent cation. Charge balance is maintained by two chloride anions. The building blocks, bridged by Li(I) cations, form cationic ribbons with chloride anions in the space between them. The ribbons propagate in [010] and are held together by a network of weak O-H?O hydrogen bonds which operate in the space between adjacent ribbons.

| S-EPMC3515122 | biostudies-literature

Poly[hexa-aqua-bis-(?(4)-pyrimidine-4,6-dicarboxyl-ato)tetra-lithium].

Project description:The asymmetric unit of the title compound, [Li(4)(C(6)H(2)N(2)O(4))(2)(H(2)O)(6)](n), comprises two Li(+) ions bridged by a completely deprotonated pyrimidine-3,6-dicarboxyl-ate ligand and coordinated by two water mol-ecules; the asymmetric units related by an inversion operation create a structural unit which forms part of a two-dimensional polymeric structure parallel to (10-1). One of the Li(+) ions shows a distorted tetra-hedral arrangement involving two symmetry-related coordinating water mol-ecules and two carboxyl-ate O atoms. The other Li(+) ion is in distorted trigonal-bipyramidal geometry defined by N and O atoms of the ligands and a water mol-ecule. Water O atoms are proton donors to carboxyl-ate O atoms forming hydrogen bonds.

| S-EPMC3470151 | biostudies-literature

Tetra-aqua-bis-[2-(pyridin-4-yl-?N)pyrimidine-5-carboxyl-ato]zinc.

Project description:In the title complex, [Zn(C(10)H(6)N(3)O(2))(2)(H(2)O)(4)], the Zn(II) ion lies on an inversion center and is coordinated in a slightly distorted octa-hedral geometry by two N atoms from two 2-(pyridin-4-yl)pyrimidine-5-carboxyl-ate ligands and four water mol-ecules. In the symmetry-unique part of the mol-ecule, the pyridine and pyrimidine rings form a dihedral angle of 7.0?(1)°. In the crystal, the coordinating water mol-ecules act as donor groups and carboxyl-ate O atoms act as acceptors in O-H?O hydrogen bonds, forming a three-dimensional network.

| S-EPMC3515163 | biostudies-literature

(μ-Ethane-1,1,2,2-tetra-carboxyl-ato)bis-[tetra-aqua-manganese(II)].

Project description:In the centrosymmetric title molecule, [Mn(2)(C(6)H(2)O(8))(H(2)O)(8)], the Mn(II) atom is in an octa-hedral environment coordinated by six O-atom donors from water mol-ecules and ethane-1,1,2,2-tetra-carboxyl-ate ligands. The crystal structure features a three-dimensional hydrogen-bonding network based on a strong and distinctive pattern of O-H⋯O hydrogen-bonding inter-actions.

| S-EPMC3099957 | biostudies-literature

Poly[?6-(naphthalene-2,6-di-carboxyl-ato)-bis-(aqua-lithium)].

Project description:The title compound, [Li2(C12H6O4)(H2O)2] n , crystallizes with one half of the molecular entities in the asymmetric unit. The second half is gererated by inversion symmetry. The crystal structure has a layered arrangement built from distorted edge-sharing LiO3(OH)2 tetra-hedra parallel to (100), with naphthalenedi-carboxyl-ate bridging the LiO3(OH)2 layers along the [100] direction. Hydrogen bonding between the water molecule and adjacent carboxylate groups consolidates the packing.

| S-EPMC4158488 | biostudies-literature

Tetra-aqua-hexa-kis(μ(2)-quinoline-4-carboxyl-ato)diyttrium(III) dihydrate.

Project description:In the title centrosymmetric binuclear complex, [Y(2)(C(10)H(6)NO(2))(6)(H(2)O)(4)]·2H(2)O, each Y(III) atom is nine-coordin-ated by nine O atoms from five ligands and two water mol-ecules in a slightly distorted monocapped square-anti-prismatic coordination environment. The Y(III) atoms are separated by a distance of 4.0363 (9) Å. The ligands coordinate in three different modes: chelating, bridging and a mixed chelating bridging mode. In the crystal structure, the binuclear complexes are linked by O-H⋯O and O-H⋯N hydrogen bonds, forming a three-dimensional network.

| S-EPMC2960038 | biostudies-literature

Bis(hydrazin-1-ium) bis-(?(2)-pyridazine-3,6-dicarboxyl-ato)bis-(aqua-lithiate) octa-aqua-bis-(?(3)-pyridazine-3,6-dicarboxyl-ato)tetra-lithium.

Project description:The unit cell of the title compound, (N(2)H(5))(2)[Li(2)(C(6)H(2)N(2)O(4))(2)(H(2)O)(2)]·[Li(4)(C(6)H(2)N(2)O(4))(2)(H(2)O)(8)], comprises two centrosymmetric complexes, one double negatively charged and one neutral, and two mono-protonated hydrazine cations. The anionic complex molecule is a dimer, built of a pair of symmetry-related pyridazine-3,6-dicarboxyl-ate ligands and a pair of Li(I) ions, each coordinated by two N,O-chelating sites donated by a ligand mol-ecule and an aqua O atom at the apical position. The penta-coordination around the Li(I) ions is partway between a trigonal-bipyramidal and a square-pyramidal arrangement. The two carb-oxy-lic acid groups of the ligand are deprotonated and one carboxyl-ate O atom of each group is not involved in the coordination, and this applies to both the anionic and the neutral complex. The neutral complex molecule is also composed of a pair of Li(I) ions and a pair of ligand mol-ecules related by a centre of symmetry. They form a dimeric core in which the penta-coordination of the Li(I) ions includes two N,O-bonding groups donated by two ligands and an aqua O atom. The penta-coordination is described as partway between a trigonal-bipyramidal and a square-pyramidal arrangement. The coordinated carboxyl-ate group is bidentate-bridging, forming with an Li(H(2)O)(3) unit a neutral tetra-meric mol-ecule. The coordination of the tetra-coordinated Li(I) ion shows a slightly distorted tetra-hedral geometry. An extended system of O-H?O and N-H?O hydrogen bonds contributes to the stability of the crystal structure.

| S-EPMC3297271 | biostudies-literature

Poly[[bis-(nitrato-?O)bis-(?(4)-pyridine-4-carboxyl-ato)tetra-kis-(?(3)-pyridine-4-carboxyl-ato)octa-silver(I)] hemihydrate].

Project description:In the title coordination polymer, {[Ag(8)(C(6)H(4)NO(2))(6)(NO(3))(2)]·0.5H(2)O}(n), two Ag(I) ions are two-coordinate within an AgN(2) set and six are three-coordinate within AgN(2)O and AgO(3) sets. The Ag-N and Ag-O distances are in the ranges 2.150?(5)-2.198?(5) and 2.142?(4)-2.702?(5)?Å, respectively. A two-dimensional coordination network is formed parallel to (100). The O atom of the disordered solvent water mol-ecule is located on an inversion center.

| S-EPMC3212179 | biostudies-literature

Poly[[tetra-aqua-bis-(?(3)-5-carboxybenzene-1,2,4-tri-carboxyl-ato)tricadmium] tetra-hydrate].

Project description:There are three independent Cd(II) ions in the title complex, {[Cd(3)(C(10)H(3)O(8))(2)(H(2)O)(4)]·4H(2)O}(n), one of which is coordinated by four O atoms from three 5-carboxybenzene-1,2,4-tri-carboxyl-ate ligands and by two water mol-ecules in a distorted octa-hedral geometry. The second Cd(II) ion is coordinated by five O atoms from four 5-carboxybenzene-1,2,4-tri-carboxyl-ate ligands and by one water mol-ecule also in a distorted octa-hedral geometry while the third Cd(II) ion is coordinated by five O atoms from three 5-carboxybenzene-1,2,4-tri-carboxyl-ate ligands and by one water mol-ecule in a highly distorted octa-hedral geometry. The 5-carboxybenzene-1,2,4-tri-carboxyl-ate ligands bridge the Cd(II) ions, resulting in the formation of a three-dimensional structure. Intra- and inter-molecular O-H?O hydrogen bonds are present throughout the three-dimensional structure.

| S-EPMC3379128 | biostudies-literature

Tetra-aqua-bis-(6-chloro-pyridine-3-carboxyl-ato-?O)cobalt(II) tetra-hydrate.

Project description:In the title compound, [Co(C(6)H(3)ClNO(2))(2)(H(2)O)(4)]·4H(2)O, the Co(II) cation is located on an inversion center and is coordinated by four water mol-ecules and two 6-chloro-pyridine-3-carboxyl-ate anions in a slightly distorted octa-hedral geometry. In the crystal, complex mol-ecules and lattice water mol-ecules are linked by O-H?O and O-H?N hydrogen bonds into a three-dimensional network.

| S-EPMC3515139 | biostudies-literature

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