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Hexaaqua-cobalt(II) bis-(2,2'-sulfanediyldiacetato-κO,S,O')cobaltate(II) tetra-hydrate.

ABSTRACT: The two Co(II) atoms in the title salt, [Co(H(2)O)(6)][Co(C(4)H(4)O(4)S)(2)]·4H(2)O, exist in an octa-hedral coordination environment. In the cation, the Co atom is surrounded by six water mol-ecules, and in the anion, it is bis-O,S,O'-chelated by the thio-acetate ligands. The cations, anions and uncoordinated water mol-ecules are linked by O-H⋯O hydrogen bonds into a three-dimensional network.

SUBMITTER: Wang H

PROVIDER: S-EPMC3246949 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Tetra-aqua-bis-(2-methyl-1H-benzimidazolium-1,3-diacetato-κO)cobalt(II) tetra-hydrate.

Project description:In the title compound, [Co(C(12)H(11)N(2)O(4))(2)(H(2)O)(4)]·4H(2)O, the Co(II) atom lies on an inversion center and is octa-hedrally coordinated by six O atoms from four water mol-ecules and two monodentate zwitterionic 2-methyl-benzimidazolium-1,3-diacetate ligands. An intra-molecular O-H⋯O hydrogen bond occurs. In the crystal, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network. π-π inter-actions between the imidazole and benzene rings [centroid-centroid distance = 3.9031 (17) Å] consolidate the crystal packing.

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Bis(2,4,6-triamino-1,3,5-triazin-1-ium) hexa-aqua-cobalt(II) bis-[bis-(pyridine-2,6-dicarboxyl-ato)cobaltate(II)] tetra-hydrate.

Project description:The title compound, (C(3)H(7)N(6))(2)[Co(H(2)O)(6)][Co(C(7)H(3)NO(4))(2)](2)·4H(2)O, or (tataH)(2)[Co(H(2)O)(6)][Co(pydc)(2)](2)·4H(2)O (where tata is 2,4,6-triamino-1,3,5-triazine and pydc is pyridine-2,6-dicarboxylic acid), was obtained by reaction of Co(NO(3))(2)·6H(2)O with the proton-transfer compound (tataH)(2)(pydc) in aqueous solution. The [Co(pydc)(2)](2-) anion is a six-coordinate Co(II) complex with a distorted octa-hedral coordination geometry. The structure also contains hexa-aqua-cobalt(II) cations (site symmetry ), (tataH)(+) cations and uncoordinated water mol-ecules. The two(pydc)(2-) ligands in each [Co(pydc)(2)](2-) anion are almost perpendicular to each other [dihedral angle between their mean planes = 82.3 (1)°]. There is extensive O-H⋯O, N-H⋯N, O-H⋯N and C-H⋯O hydrogen bonding in the structure, as well as π-π stacking between (pydc)(2-) ligands with an inter-planar distance of 3.484 (15) Å.

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| S-EPMC2960671 | biostudies-literature

Hexaaqua-copper(II) dichloride bis-(hexa-methyl-enetetra-mine) tetra-hydrate.

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cyclo-Tetra-μ-malato-κO,O',O'':O'''-tetra-kis[bis-(1H-benzimidazole-κN)cobalt(II)] eicosa-hydrate.

Project description:The title compound, [Co(4)(C(4)H(4)O(5))(4)(C(7)H(6)N(2))(8)]·20H(2)O, consists of tetra-nuclear Co(II) complexes and disordered uncoordinated water mol-ecules. The tetra-meric complex mol-ecule has symmetry. While two benzimidazole mol-ecules and a tridentate malate dianion coordinate a Co(II) ion, the carboxylate O atom from an adjacent malate dianion bridges the Co(II) ions to complete a distorted octa-hedral coordination geometry. The tridentate malate dianion chelates the Co(II) ion, and the chelate six- and five-membered rings show half-chair and envelope configurations, respectively. A face-to-face separation of 3.494 (9) Å between parallel benzimidazole ligands indicates the existence of π-π stacking between adjacent complexes. The crystal structure also involves N-H⋯O and O-H⋯O hydrogen bonds.

| S-EPMC2960982 | biostudies-literature

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Project description:The Co(II) atom in the title compound, [Co(C(8)H(5)O(3))(2)(H(2)O)(4)]·4H(2)O, which exists in an all-trans octa-hedral coordination geometry, lies on a center of inversion. The coordinated and uncoordinated water mol-ecules engage in extensive hydrogen-bonding inter-actions, forming a three-dimensional hydrogen-bonded network.

| S-EPMC2960768 | biostudies-literature

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Project description:The asymmetric unit of the title compound, [Mg(H(2)O)(6)](C(9)H(6)N(3)O(3)S)(2)·4H(2)O, contains half of a centrosymmetric cation, one 4-(3-pyrid-yl)pyrimidin-2-sulfonate anion and two solvent water mol-ecules. Inter-molecular O-H⋯O and O-H⋯N hydrogen bonds link the cations, anions and water mol-ecules into a three-dimensional supra-molecular structure. The crystal packing also exhibits inter-molecular π-π inter-actions between the aromatic rings of the anions with a centroid-centroid distance of 3.604 (2) Å.

| S-EPMC2970970 | biostudies-literature

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