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μ-Oxalato-κO,O:O,O-bis-[diaqua-(2,2'-bipyridyl-κN,N')zinc] bis-[2-(1H-benzotriazol-1-yl)acetate] hexa-hydrate.

ABSTRACT: The asymmetric unit of the title compound, [Zn(2)(C(2)O(4))(C(10)H(8)N(2))(2)(H(2)O)(4)](C(8)H(6)N(3)O(2))(2)·6H(2)O, contains one half of the centrosymmetric binuclear cation, one anion and three water mol-ecules. In the cation, the oxalate ligand bridges two Zn(II) ions in a bis-bidentate fashion, so each Zn(II) ion is coordinated by two O atoms from the oxalate ligand, two N atoms from two 2,2'-bipyridine ligands and two water mol-ecules in a distorted octa-hedral arrangement. The mean planes of the oxalate and 2,2'-bipyridine ligands form a dihedral angle of 80.0 (1)°. An extensive three-dimensional hydrogen-bonding network formed by classical O-H⋯O and O-H⋯N inter-actions consolidates the crystal packing.

SUBMITTER: Zeng L

PROVIDER: S-EPMC3274917 | biostudies-literature |

REPOSITORIES: biostudies-literature

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μ-Biphenyl-3,3',4,4'-tetra-carboxyl-ato-κO:O-bis-[triaqua-(2,2'-bipyridyl-κN,N')nickel(II)] hexa-hydrate.

Project description:The asymmetric unit of the title complex, [Ni(2)(C(16)H(6)O(8))(C(10)H(8)N(2))(2)(H(2)O)(6)]·6H(2)O, contains one Ni(II) atom, one 2,2'-bipyridine ligand, three coordinated water mol-ecules, one-half of a fully deprotonated biphenyl-3,3',4,4'-tetra-carboxyl-ate anion and three lattice water mol-ecules. The Ni(II) atom displays a distorted NiN(2)O(4) octa-hedral coordination formed by one carboxyl-ate O atom, three water O atoms and two N atoms of the chelating ligand. The complete biphenyl-3,3',4,4'-tetra-carboxyl-ate ligand displays inversion symmetry and links two symmetry-related Ni(II) atoms into a binuclear complex. Neighbouring complex mol-ecules are linked through O-H⋯O hydrogen bonds into a three-dimensional structure. Additional O-H⋯O hydrogen bonds between the lattice water mol-ecules help to consolidate the crystal packing.

| S-EPMC2977608 | biostudies-literature

(Formato-κO)bis-(1,10-phenanthroline-κN,N')copper(II) formate hexa-hydrate.

Project description:In the title compound, [Cu(CHO(2))(C(12)H(8)N(2))(2)]CHO(2)·6H(2)O, the Cu atom is coordinated in a distorted trigonal-bipyramidal fashion by an O atom of the formate ligand and four N atoms of two phenanthroline ligands with Cu-O and Cu-N distances of 2.020 (3) and 1.978 (3)-2.177 (3) Å, respectively. Hydrogen bonding O-H⋯O between water molecules and between water anions as well as π-π inter-actions [centroid-centroid distances between phen rings = 3.38 (7) and 3.40 (5) Å] are responsible for the supra-molecular assembly.

| S-EPMC2960151 | biostudies-literature

(Heptanedioato-κO,O')bis-(1,10-phenanthroline-κN,N')zinc(II) hexa-hydrate.

Project description:In the crystal structure of the title compound, [Zn(C(7)H(10)O(4))(C(12)H(8)N(2))(2)]·6H(2)O, the Zn(II) atom is coordinated by two carboxyl-ate O atoms of a mono-bidentate chelating pimelate anion (pimelic acid is hepta-nedioic acid) and four N atoms of two phenanthroline ligands, forming a considerably distorted octa-hedral ZnN(4)O(2) coordination geometry. The complexes are assembled into a three-dimensional network via C-H⋯O, C-H⋯π and π-π inter-actions. The mean inter-planar distance between adjacent phenanthroline ligands is 3.399 (2) Å.

| S-EPMC2961045 | biostudies-literature

Bis(2,2'-bipyridine-κN,N')(maleato-κO,O)nickel(II) 7.34-hydrate.

Project description:The title compound, [Ni(C(4)H(2)O(4))(C(10)H(8)N(2))(2)]·7.34H(2)O, was obtained by crystallization from an aqueous ethano-lic reaction mixture containing nickel(II) acetate, maleic acid, bipyridine, sodium hydroxide and ammonia. The asymmetric unit contains one independent complex mol-ecule and 7.34 water mol-ecules occupying eight crystallographically independent positions. Two of these water molecules are disordered. The nickel(II) atom is coordinated in a distorted octa-hedral geometry by two O atoms from one carboxyl-ate group of the maleato ligand and by four N atoms from two 2,2'-bipyridine (bipy) ligands. The water mol-ecules, along with the O atoms of the uncoordinated carboxyl-ate group, form an extended hydro-philic three-dimensional hydrogen-bonded system with large cavities in which the hydro-phobic bipy ligands are located. One H atom of the maleate ligand is involved in a weak hydrogen bond of the C-H⋯O type. Stacking inter-actions between the pyridyl rings of the bipy ligands [centroid-centroid distance = 3.549 (15) Å] lead to the formation of pairs of complex mol-ecules.

| S-EPMC2960002 | biostudies-literature

Bis(2,2'-bipyridyl-κN,N')(sulfato-κO,O')zinc(II) ethane-1,2-diol solvate.

Project description:The title compound, [Zn(SO(4))(C(10)H(8)N(2))(2)]·C(2)H(6)O(2), is a six-coordinate zinc(II) complex with a distorted octa-hedral coordination geometry. The Zn(II) atom is bonded by two O atoms of the bidentate chelating sulfate ligand and four N atoms of the two chelating 2,2'-bipyridine ligands. The Zn-N bond distances range from 2.1287 (17) to 2.1452 (17) Å and the Zn-O bond distance is 2.1811 (15) Å. The two chelating NCCN groups subtend a dihedral angle of 81.1 (1)°. In the crystal structure, the [ZnSO(4)(C(10)H(8)N(2))(2)] and C(2)H(6)O(2) units are connected by inter-molecular O-H⋯O hydrogen bonding, which leads to additional stabilization of the structure.

| S-EPMC2979970 | biostudies-literature

Bis(dimethyl-malonato-κO,O')bis-[4-(4-pyridylamino-κN)pyridinium]nickel(II) hexa-hydrate.

Project description:In the title compound, [Ni(C(5)H(6)O(4))(2)(C(10)H(10)N(3))(2)]·6H(2)O, divalent nickel ions situated on the crystallographic twofold axis are octa-hedrally coordinated by four O atoms from two dimethyl-malonate ligands in a 1,3-chelating mode and two N atoms from two protonated monodentate 4,4'-dipyridylamine mol-ecules. The mol-ecules link into chains via N-H⋯O hydrogen bonding mediated by protonated pyridyl groups. The chains form layer patterns via π-π stacking [centroid-centroid distance = 3.777 (2) Å] . Water mol-ecule hexa-mers are generated from the unligated water mol-ecules (three per asymmetric unit) by inversion centers at Wyckoff position d. These clusters are situated between the pseudolayers, providing hydrogen-bonding pathways that build up the three-dimensional structure.

| S-EPMC2960085 | biostudies-literature

Bis(μ-2,2'-bi-1H-imidazole-1,1'-di-acet-ato)bis-[diaqua-cobalt(II)] hexa-hydrate.

Project description:The dinuclear title compound, [Co(2)(C(10)H(8)N(4)O(4))(2)(H(2)O)(4)]·6H(2)O, lies about an inversion centre. Each Co(II) atom is six-coordinated by two water mol-ecules, two carboxyl-ate O atoms and two N atoms of two symmetry-related 2,2'-bi-1H-imidazole-1,1'-diacetate (L(2-)) ligands in a slightly distorted octa-hedral geometry. Mol-ecules are linked into a three-dimensional framework via O-H⋯O and C-H⋯O hydrogen bonds.

| S-EPMC2977594 | biostudies-literature

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

(Acetato-κO)bis-(2,2'-bipyridyl-κN,N')copper(II)-ethyl sulfate-methyl sulfate (1/0.5/0.5).

Project description:In the title complex, [Cu(C(2)H(3)O(2))(C(10)H(8)N(2))(2)](CH(3)CH(2)OSO(3))(0.5)(CH(3)OSO(3))(0.5), the Cu(II) ion is bis-chelated by two 2,2'-bipyridine lignds and coordinated by an O atom of an acetate ligand in a CuN(4)O disorted square-pyramidal environment. In the structure, equal amounts of methyl sulfate and ethyl sulfate anions are disordered on the same crystallographic sites. The crystal structure is stabilized by weak inter-molecular C-H⋯O inter-actions.

| S-EPMC2959956 | biostudies-literature

(2,2'-Bipyridine-κN,N')bis-(3-meth-oxy-benzoato-κO,O)copper(II) mono-hydrate.

Project description:The title compound, [Cu(C(8)H(7)O(3))(2)(C(10)H(8)N(2))]·H(2)O, is comprised of a Cu(II) ion, two 3-meth-oxy-benzoate ligands, a 2,2'-bipyridine (bipy) ligand and one uncoordinated water mol-ecule. The Cu(II) ion and the water O atom lie on a twofold axis. The Cu(II) ion exhibits a six-coordinate distorted octa-hedral geometry, with two N atoms from the bipy ligand [Cu-N = 1.9996 (16) Å] and four O atoms from two 3-meth-oxy-benzoate ligands [Cu-O = 1.9551 (15) and 2.6016 (16) Å]. The mol-ecules are linked by O-H⋯O and C-H⋯O hydrogen bonds, forming a three-dimensional network.

| S-EPMC3052164 | biostudies-literature

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