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Tetra-?-2,5-difluoro-benzoato-bis-[(2,2'-bipyridine)(2,5-difluoro-benzoato)gadolinium(III)].

ABSTRACT: In the centrosymmetric title compound, [Gd(2)(C(7)H(3)F(2)O(2))(6)(C(10)H(8)N(2))(2)], the asymmetric unit comprises one cation chelated by two 2,5-difluoro-benzoate and one 2,2'-bipyridine. Two cations are linked into dimers via three bridging carboxyl-ate groups from three 2,5-difluoro-benzoic acid units. The Gd(III) ion is nine-coord-inated by seven O atoms and two N atoms.

PROVIDER: S-EPMC2960618 | BioStudies |

REPOSITORIES: biostudies

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Tetra-kis(μ-2,4-difluoro-benzoato)bis-[(2,4-difluoro-benzoato)(1,10-phenanthroline)gadolinium(III)].

Project description:In the title compound, [Gd(2)(C(7)H(3)F(2)O(2))(6)(C(12)H(8)N(2))(2)], the asymmetric unit comprises one Gd(3+) cation chelated by two 2,4-difluoro-benzoate and one 1,10-phenanthroline ligands. Two cations are linked into a centrosymmetric dimer via three bridging carboxyl-ate groups of 2,4-difluoro-benzoate ligands. Each Gd(3+) ion is nine-coordinated by seven O atoms and two N atoms.

| S-EPMC2960912 | BioStudies

Tetra-kis(?-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

Diaqua-bis-(2-chloro-benzoato-?O)bis-(nicotinamide-?N (1))cobalt(II).

Project description:In the title complex, [Co(C7H4ClO2)2(C6H6N2O)2(H2O)2], the Co(II) cation is located on an inversion center and is coord-inated by two 2-chloro-benzoate anions, two nicotin-amide (NA) ligands and two water mol-ecules. The four O atoms in the equatorial plane around the Co(II) cation form a slightly distorted square-planar arrangement, while the slightly distorted octa-hedral coordination is completed by the two pyridine N atoms of the NA ligands in the axial positions. The dihedral angle between the carboxyl-ate group and the adjacent benzene ring is 29.7?(4)°, while the pyridine and benzene rings are oriented at a dihedral angle of 83.17?(15)°. Intra-molecular O-H?O hydrogen bonding occurs between the carboxyl-ate group and coordinating water mol-ecule. In the crystal, inter-molecular N-H?O, O-H?O and weak C-H?O hydrogen bonds link the mol-ecules into a three-dimensional network.

| S-EPMC3588457 | BioStudies

Di-?-nicotinamide-?(2) N (1):O;?(2) O:N (1)-bis-[aqua-bis-(3-chloro-benzoato-?(2) O,O')cadmium].

Project description:In the centrosymmetric dinuclear title compound, [Cd2(C7H4ClO2)4(C6H6N2O)2(H2O)2], the Cd(II) atom is coord-inated by one N atom from one bridging nicotinamide ligand and one O atom from another symmetry-related bridging nicotinamide ligand, four O atoms from two 3-chloro-benzoate ligands and one water mol-ecule in an irregular geometry. The dihedral angles between the carboxyl-ate groups and the adjacent benzene rings are 6.98?(12) and 2.42?(13)°, while the benzene rings are oriented at a dihedral angle of 4.33?(6)°. Inter-molecular O-H?O, N-H?O and weak C-H?O hydrogen bonds link the mol-ecules into a three-dimensional network. ?-? inter-actions, indicated by short centroid-centroid distances [3.892?(1)?Å between the pyridine rings and 3.683?(1)?Å between the benzene rings] further stabilize the structure.

| S-EPMC3772423 | BioStudies

Tetra-aqua-bis-(2,6-dihy-droxy-benzoato-?O)(2,6-dihy-droxy-benzoato-?O,O)gadolinium(III) dihydrate.

Project description:In the title compound, [Gd(C(7)H(5)O(4))(3)(H(2)O)(4)]·2H(2)O, the Gd(III) ion shows a distorted square anti-prismatic coordination formed by four aqua ligands and four O atoms from the three 2,6-dihy-droxy-benzoate (L) ligands. Two L ligands coordinate the Gd(III) ion in a monodentate mode, while the third coordinates it in a bidentate-chelating coordination mode. An extensive three-dimensional O-H?O hydrogen-bonding network consolidates the crystal packing.

2011-01-01 | S-EPMC3120440 | BioStudies

Bis{μ4-N-[phen-yl(pyridin-2-yl-aza-nid-yl)meth-yl]pyridin-2-aminido}tetra-kis(tetra-hydro-furan)-tetra-lithium.

Project description:The title complex, [Li4(C17H14N4)2(C4H8O)4], bears a novel tetra-dentate di-amido ligand. In the tetra-nuclear centrosymmetric complex mol-ecule, the metal atoms exhibit two kinds of coordination modes. The middle two Li(+) cations are coord-inated by four N (ligand) and one O (tetra-hydro-furan, THF) atoms, resulting in a distorted square-pyramidal geometry. The outer two Li(+) cations are in distorted tetra-hedral environments consisting of three N (ligand) and one O (THF) atoms. The Li-N bond lengths vary from 2.020 (7) to 2.441 (6)Å.

| S-EPMC3885009 | BioStudies

Poly[?5-(4-meth-oxy-benzene-sulfonato)-sodium].

Project description:In the title complex, [Na(C7H7O4S)] n , the Na(I) ion is coord-inated in a slightly distorted penta-gonal-bipyramidal environment by seven O atoms [Na-O = 2.3198?(16)-2.5585?(17)?Å]. The 4-methoxybenzenesulfonate anions act as bis-chelating and bridging ligands, forming a two-dimensional polymer parallel to (001), which is further linked into a three-dimensional network by weak C-H?O hydrogen bonds.

| S-EPMC3790362 | BioStudies

catena-Poly[[trimethyl-tin(IV)]-?-2,5-difluoro-benzoato-?O:O'].

Project description:In the title polymeric coordination compound, [Sn(CH(3))(3)(C(7)H(3)F(2)O(2))](n), the Sn atom exhibits a distorted trigonal-bipyramidal coordination geometry with the carboxyl-ate O atoms in the axial positions and the equatorial positions occupied by the methyl groups. The two Sn-O bond lengths are 2.225?(5) and 2.410?(6)?Å.

2008-01-01 | S-EPMC2967876 | BioStudies

Aqua-chlorido{?-6,6'-dieth-oxy-2,2'-[1,2-phenyl-enebis(nitrilo-methyl-idyne)]diphenolato}copper(II)sodium(I) N,N-dimethyl-formamide solvate.

Project description:In the heterometallic dinuclear title compound, [CuNa(C(24)H(22)N(2)O(4))Cl(H(2)O)]·C(3)H(7)NO, the Cu(II) ion is coord-inated in a square-planar geometry by two N atoms and two O atoms of the 6,6'-dieth-oxy-2,2'-[1,2-phenyl-enebis(nitrilo-methyl--idyne)]diphenolate ligand. The Na(I) ion is hexa-coordinated by four O atoms of the ligand, defining the equatorial plan, and by one O atom of the water mol-ecule and one Cl atom occuping axial positions. The Cu(II) and Na(I) ions are bridged by two phenolate O atoms.

| S-EPMC2980255 | BioStudies

catena-Poly[(?(2)-3-carb-oxy-5-nitro-benzoato)(?(3)-5-nitro-benzene-1,3-dicarboxyl-ato)(1,10-phenanthroline)gadolinium(III)].

Project description:The crystal structure of the title complex, [Gd(C(8)H(3)NO(6))(C(8)H(4)NO(6))(C(12)H(8)N(2))](n), contains polymeric chains made up of Gd(III) atoms, 1,10-phenanthroline and fully or half-deproton-ated 5-nitro-benzene-1,3-dicarb-oxy-lic acid (H(2)L) ligands. The Gd(III) atom is coordinated in a distorted bicapped trigonal-prismatic fashion by six O atoms from two HL(-) and three L(2-) ligands, and by two N atoms from the 1,10-phenanthroline ligand. The L(2-) ligands bridge the Gd-phenanthroline units, forming chains running parallel to [100]. O-H?O hydrogen bonding as well as ?-? stacking inter-actions with an inter-planar distance of 3.599?(2)?Å assemble neighboring polymeric chains.

| S-EPMC2983181 | BioStudies

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