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Hexaaqua-zinc(II) dichloride bis-(hexa-methyl-enetetramine) tetra-hydrate.

ABSTRACT: The title compound, [Zn(H(2)O)(6)]Cl(2)·2C(6)H(12)N(4)·4H(2)O, has been prepared under mild hydro-thermal conditions. The Zn(II) atom, located on a centre of symmetry, is coordinated by six water mol-ecules in a distorted octa-hedral coordination geometry. The hexa-methyl-enetetra-mine mol-ecule is not coordinated to Zn(II) but links the Zn complexes via three O-H?N hydrogen bonds. The remaining N atom of the hexa-methyl-enetetra-mine mol-ecule is hydrogen-bonded to a solvent water mol-ecule. In the crystal structure, inter-molecular O-H?O, O-H?N and O-H?Cl hydrogen bonds link the components into a three-dimensional network.

SUBMITTER: Yao XJ

PROVIDER: S-EPMC2960671 | biostudies-literature | 2008 Aug

REPOSITORIES: biostudies-literature

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Hexaaqua-zinc(II) dichloride bis-(hexa-methyl-enetetramine) tetra-hydrate.

Yao Xin Jian XJ Xuan Ya Wen YW Wu Wen W

Acta crystallographica. Section E, Structure reports online 20080806 Pt 9

The title compound, [Zn(H(2)O)(6)]Cl(2)·2C(6)H(12)N(4)·4H(2)O, has been prepared under mild hydro-thermal conditions. The Zn(II) atom, located on a centre of symmetry, is coordinated by six water mol-ecules in a distorted octa-hedral coordination geometry. The hexa-methyl-enetetra-mine mol-ecule is not coordinated to Zn(II) but links the Zn complexes via three O-H⋯N hydrogen bonds. The remaining N atom of the hexa-methyl-enetetra-mine mol-ecule is hydrogen-bonded to a solvent water mol-ecule. In ...[more]

PMID: 21201590

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

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Project description:The title compound, [Ni(H(2)O)(6)][Ni(3)(C(7)H(3)NO(4))(4)(H(2)O)(4)]·8H(2)O, was obtained by the reaction of nickel(II) nitrate hexa-hydrate with pyridine-2,6-dicarb-oxy-lic acid (pydcH(2)) and 1,10-phenanothroline (phen) in an aqueous solution. The latter ligand is not involved in formation of the title complex. There are three different Ni(II) atoms in the asymmetric unit, two of which are located on inversion centers, and thus the [Ni(H(2)O)(6)](2+) cation and the trinuclear {[Ni(pydc)(2)](2)-?-Ni(H(2)O)(4)}(2-) anion are centrosymmetric. All Ni(II) atoms exhibit an octa-hedral coordination geometry. Various inter-actions, including numerous O-H?O and C-H?O hydrogen bonds and C-O?? stacking of the pyridine and carboxyl-ate groups [3.570?(1), 3.758?(1) and 3.609?(1)?Å], are observed in the crystal structure.

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Project description:The asymmetric unit of the title compound, [Zn(C(12)H(11)N(2)O(4))(2)(H(2)O)(4)]·4H(2)O, contains one-half of the complex mol-ecule and two uncoordin-ated water mol-ecules. The four water O atoms in the equatorial plane around the Zn(II) centre ( symmetry) form a distorted square-planar arrangement, while the distorted octa-hedral coordination geometry is completed by the O atoms of the zwitterionic 2-methyl-benzimidazolium-1,3-diacetate ligands in the axial positions. The benzimidazole ring system is planar, with a maximum deviation of 0.041?(3)?Å. Intra-molecular O-H?O hydrogen bonding results in the formation of a non-planar six-membered ring. In the crystal structure, strong intra- and inter-molecular O-H?O hydrogen bonds link the mol-ecules into a three-dimensional network. ?-? contacts between benzimidazole rings [centroid-centroid distance = 3.899?(1)?Å] may further stabilize the structure.

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Hexaaqua-magnesium(II) bis-{[N-(4-meth-oxy-2-oxidobenzyl-idene)glycyl-glycinato(3-)]cuprate(II)} hexa-hydrate.

Project description:In the title complex, [Mg(H(2)O)(6)][Cu(C(12)H(11)N(2)O(5))](2)·6H(2)O, the Cu(II) atoms lie at the center of the square plane of triple negatively charged O,N,N',O'-tetra-dentate Schiff base ligands, which are coordinated by one phenolate O atom, one imine N atom, one deprotonated amide N atom and one carboxyl-ate O atom. The Mg(II) center, which sits on an inversion center, is coordinated by six aqua ligands and exhibits a slightly distorted octa-hedral conformation. The asymmetric unit consists of an [N-(4-meth-oxy-2-oxidobenzyl-idene)glycyl-glycinato]cuprate(II) anion, one half of an [Mg(H(2)O)(6)](2+) cation and three free water mol-ecules. The cations and anions form columns by O-H?O hydrogen bonds.

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