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Bis(μ-4-hydroxy-benzoato-κO:O')bis-[triaqua-bis(4-hydroxy-benzoato)-κO;κO,O'-terbium(III)] deca-hydrate.

ABSTRACT: The title dinuclear compound, [Tb(2)(C(7)H(5)O(3))(6)(H(2)O)(6)]·10H(2)O, lies on a center of inversion and the two Tb(III) atoms are bridged by two 4-hydroxy-benzoate anions; each metal atom is further coordinated by one monodentate anion and chelated by the third anion. The eight-coordinate geometry approximates a square anti-prism. Hydrogen bonds of the O-H⋯O type connect the uncoordinated water mol-ecules to the dinuclear species, forming a three-dimensional network.

SUBMITTER: Zhu YM

PROVIDER: S-EPMC2979992 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Bis(μ-3-hydroxy-benzoato)-κO:O;κO:O-bis-[bis-(1H-benzimidazole-κN)(3-hydroxy-benzoato-κO)nickel(II)] bis-(1H-benzimidazole-κN)bis-(3-hy-droxy-benzoato-κO)nickel(II) hexa-hydrate.

Project description:The title compound, [Ni(2)(C(7)H(5)O(3))(4)(C(7)H(6)N(2))(4)][Ni(C(7)H(5)O(3))(2)(C(7)H(6)N(2))(2)]·6H(2)O, is a mononuclear/dinuclear nickel(II) cocrystal, the two mol-ecular species inter-acting through hydrogen bonds that involve the uncoordinated water mol-ecules. In the mononuclear species, the Ni(II) ion, located on an inversion center, is coordinated by two 1H-benzimidazole (bzim) ligands and two 3-hydroxy-benzoate (hba) anions in a square-planar geometry. In the centrosymmetric dinuclear species, the Ni(II) ion is coordinated by two bzim ligands and three hba anions in a square-pyramidal geometry; of the two independent hba anions, one bridges two Ni(II) ions with both carboxylate and hydroxyl groups whereas the other coordin-ates in a unidentate manner to the Ni(II) ion. The apical Ni-O(hydrox-yl) bond is 0.39 Å longer than the basal Ni-O(carbox-yl) bonds. The face-to-face separation of 3.326 (9) Å indicates the existence of π-π stacking between parallel bzim ligands of adjacent dinuclear entities. Extensive N-H⋯O and O-H⋯O hydrogen bonds help to stabilize the crystal structure.

| S-EPMC2960256 | biostudies-literature

Bis[μ-4-(1H-imidazol-3-ium-1-yl)benzoato-κO:O']bis-[(methanol)tris-(nitrato-κO,O')terbium(III)].

Project description:In the centrosymmetric dinuclear title complex, [Tb(2)(NO(3))(6)(C(10)H(8)N(2)O(2))(2)(CH(3)OH)(2)], the Tb atoms are bridged by the carboxyl-ate groups of the two 4-(1H-imidazol-3-ium-1-yl)benzoate (iba) ligands. The iba ligand adopts a zwitterionic form with a protonated imidazole group. The Tb atom adopts a distorted tricapped trigonal-prismatic coordination geometry and is coordinated by six O atoms of three chelating nitrate ions, one O atom of the methanol mol-ecule and two O atoms of two iba ligands. The intra-molecular Tb⋯Tb separation is 5.1419 (3) Å. O-H⋯O and N-H⋯O hydrogen bonds connect complex mol-ecules into a two-dimensional network.

| S-EPMC3051581 | biostudies-literature

Di-μ-benzoato-κO,O':O';κO:O,O'-bis[aqua-bis-(benzoato-κO,O')(dimethylformamide-κO)europium(III)].

Project description:The title dimeric complex, [Eu(2)(C(7)H(5)O(2))(6)(C(3)H(7)NO)(2)(H(2)O)(2)], is centrosymmetric, implying that pairs of equivalent Eu(3+) ions and ligands lie trans to each other and that the two Eu(3+) ions have exactly the same coordination environment. Each Eu(3+) ion is nine-coordinated by two bidentate benzoate ligands, two bridging tridentate chelating benzoate ligands, and one dimethylformamide and one water molecule. The coordination polyhedron of each Eu(3+) ion can be described with a distorted monocapped square-anti-prismatic geometry. The mol-ecular structure is stabilized by intra- and inter-molecular hydrogen bonds between the water mol-ecules and benzoate O atoms.

| S-EPMC3246994 | biostudies-literature

Bis(μ-3-hydroxy-benzoato-κO,O':O)bis-[aqua-(3-hydroxy-benzoato-κO,O')(1,10-phenanthroline-κN,N')lead(II)] monohydrate.

Project description:In the centrosymmetric binuclear title complex, [Pb(2)(C(7)H(5)O(3))(4)(C(12)H(8)N(2))(2)(H(2)O)(2)]·H(2)O, each Pb atom is eight-coordinated in a PbO(6)N(2) environment by two N atoms from the 1,10-phenanthroline (phen) ligand, five carboxylate O atoms from four 3-hydroxy-benzoate anions and one O atom from the coordinated water mol-ecule in a distorted bicapped trigonal-prismatic geometry. The benzoate groups coordinate each Pb(II) atom in two different ways. Two benzoate ions behave as bidentate ligands to the Pb atom, and another benzoate ion bridges the Pb atoms, forming a binuclear structure. The dimeric units are packed via O-H⋯O hydrogen bonds and π-π inter-actions between the aromatic rings of neighboring mol-ecules, with centroid-centroid distances of 3.552 (2) and 3.641 (2) Å.

| S-EPMC2915093 | biostudies-literature

Tetra-kis(μ-2,4-difluoro-benzoato)bis-[(2,2'-bipyridine)(2,4-difluoro-benzoato)terbium(III)].

Project description:In the centrosymmetric dinuclear title compound, [Tb(2)(C(7)H(3)F(2)O(2))(6)(C(10)H(8)N(2))(2)], the Tb(III) ion is coordinated by an N,N'-bidentate 2,2'-bipyridine mol-ecule, and two O,O'-bidentate 2,4-difluoro-benzoate (dfb) anions. One of the latter also bonds to the second Tb(III) centre through one of its O atoms. The third dfb anion bonds to one Tb atom from each of its O atoms. Thus, the three dfb species have three different coordination modes. This results in an irregular TbN(2)O(7) coordination sphere for the metal ion. The F atoms and their associated H atoms in the simple bidentate dfb anion are disordered over two sets of sites in a 0.672 (10):0.328 (10) ratio.

| S-EPMC2968370 | biostudies-literature

Bis(μ-3-hy-droxy-benzoato)-κO,O:O;κO:O,O-bis-[(3-hy-droxy-benzoato-κO,O')(iso-nicotinamide-κN)cadmium] tetra-hydrate.

Project description:In the title centrosymmetric binuclear Cd(II) compound, [Cd(2)(C(7)H(5)O(3))(4)(C(6)H(6)N(2)O)(2)]·4H(2)O, the six-coordinated Cd(II) atom is chelated by the carboxyl-ate groups of the two 3-hy-droxy-benzoate (HB) anions; the two monomeric units are bridged through the two O atoms of the two carboxyl-ate groups. In the crystal, O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network. π-π Contacts between the pyridine rings and between the benzene rings [centroid-centroid distances = 3.770 (1), 3.769 (1) and 3.632 (1) Å] may further stabilize the structure.

| S-EPMC3274919 | biostudies-literature

Triaqua-bis(1H-imidazole)bis-[μ(2)-2-(oxalo-amino)benzoato(3-)]dicopper(II)calcium(II) hepta-hydrate.

Project description:In the title heterotrinuclear coordination compound, [CaCu(2)(C(9)H(4)NO(5))(2)(C(3)H(4)N(2))(2)(H(2)O)(3)]·7H(2)O, the Ca(2+) cation is in a penta-gonal-bipyramidal geometry and bridges two (1H-imidazole)[2-(oxaloamino)benzoato(3-)]copper(II) units in its equatorial plane. Each Cu(II) atom has a normal square-planar geometry. The mol-ecule has approximate local (non-crystallographic) mirror symmetry and 23 classical hydrogen bonds are found in the crystal structure.

| S-EPMC2960417 | biostudies-literature

catena-Poly[bis-(μ-4-methyl-benzoato-κO:O')hepta-kis(μ-4-methyl-benzoato-κO,O':O)tris-amarium(III)].

Project description:The title samarium coordination polymer, [Sm(3)(C(8)H(7)O(2))(9)](n), was obtained by the hydro-thermal reaction of Sm(NO(3))(3) with 4-methyl-benzoic acid in alkaline aqueous solution. In the asymmetric unit, there are three crystallographically independent Sm(III) ions, two of which are eight-coordinate in a distorted square-anti-prismatic environment, while the third is nine-coordinate in a distorted tricapped trigonal-prismatic coordination. The metal centres are coordinated and bridged by four tridentate, three bidentate and two monodentate methyl-benzoate anions, forming polymeric chains running parallel to the b axis.

| S-EPMC2961567 | biostudies-literature

Aqua-(3-hydroxy-benzoato-κO)bis-(1,10-phenanthroline-κN,N')cobalt(II) 3-hydroxy-benzoate penta-hydrate.

Project description:The crystal structure of the title compound, [Co(C(7)H(5)O(3))(C(12)H(8)N(2))(2)(H(2)O)](C(7)H(5)O(3))·5H(2)O, consists of Co(II) complex cations, uncoordinated hydroxy-benzoate anions and uncoord-inated water mol-ecules. The Co(II) ion is coordinated by two phenanthroline ligands, a water mol-ecule and a 3-hydroxy-benzoate anion, and displays a distorted octa-hedral geometry. π-π stacking is observed between parallel phenanthroline ligands, the face-to-face separations being 3.454 (19) and 3.435 (7) Å. An extensive hydrogen-bonding network helps to stabilize the crystal structure. The hydroxybenzoate ligand is disordered over two positions, with site occupancy factors 0.6 and 0.4. One solvent water molecule is also disordered over two positions, with site occupancy factors 0.6 and 0.4.

| S-EPMC2960224 | biostudies-literature

μ-Oxido-bis-[bis-(phenanthroline-κN,N')(sulfato-κO)iron(III)] octa-hydrate.

Project description:The title complex, [Fe(2)O(SO(4))(2)(C(12)H(8)N(2))(4)]·8H(2)O, contains two unique Fe(III) cations, one oxide anion, four 1,10-phenanthroline (phen) ligands, two coordinated sulfate anions and eight lattice water mol-ecules. Each Fe(III) ion has an approximate octa-hedral geometry, coordinated by four N atoms from two phen mol-ecules, two O atoms from oxide and sulfate anions, respectively. The parallel phen mol-ecules form two-dimensional supermolecules through π-π stacking inter-actions [centroid-centroid distances = 3.684 (3), 3.711 (3), 3.790 (3), 3.847 (3), 3.746 (3), 3.732 (3) and 3.729 (3) Å]. This architecture is further stabilized by O-H⋯O hydrogen bonds involving the lattice water mol-ecules and sulfate O atoms.

| S-EPMC3246986 | biostudies-literature

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