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Poly[tetra-aqua-(?(8)-butane-1,2,3,4-tetra-carboxyl-ato)distrontium].

ABSTRACT: In the title compound, [Sr(2)(C(8)H(6)O(8))(H(2)O)(4))](n), the Sr(II) ion is coordinated by six O atoms of four symmetry-related ligands and two water mol-ecules in a distorted bicapped trigonal-prismatic environment. The butane-1,2,3,4-tetra-carboxyl-ate ligands lie on inversion centers and bridge Sr(II) ions, forming a three-dimensional network. Within the three-dimensional structure, there are O-H?O hydrogen bonds involving the water mol-ecules and carboxyl-ate O atoms.

SUBMITTER: Cheng PC

PROVIDER: S-EPMC3238625 | biostudies-literature | 2011 Dec

REPOSITORIES: biostudies-literature

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Poly[tetra-aqua-(μ(8)-butane-1,2,3,4-tetra-carboxyl-ato)distrontium].

Cheng Pei-Chi PC Zhan Jun-Xiang JX Wu Cheng-You CY Lin Chia-Her CH

Acta crystallographica. Section E, Structure reports online 20111105 Pt 12

In the title compound, [Sr(2)(C(8)H(6)O(8))(H(2)O)(4))](n), the Sr(II) ion is coordinated by six O atoms of four symmetry-related ligands and two water mol-ecules in a distorted bicapped trigonal-prismatic environment. The butane-1,2,3,4-tetra-carboxyl-ate ligands lie on inversion centers and bridge Sr(II) ions, forming a three-dimensional network. Within the three-dimensional structure, there are O-H⋯O hydrogen bonds involving the water mol-ecules and carboxyl-ate O atoms. ...[more]

PMID: 22199516

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Project description:In the title compound, {(NH(4))(2)[Zn(C(8)H(6)O(8))]·4H(2)O}(n), the asymmetric unit contains one ammonium cation, half of a butane-1,2,3,4-tetra-carboxyl-ate anion, one Zn(2+) cation and two water mol-ecules. The butane-1,2,3,4-tetra-carboxyl-ate ligand is located about an inversion centre at the mid-point of the central C-C bond. The Zn(2+) cation is situated on a twofold rotation axis and is surrounded by four O atoms from four symmetry-related butane-1,2,3,4-tetra-carboxyl-ate anions in a distorted tetra-hedral environment. In turn, each anion coordinates to four Zn(2+) cations. The bridging mode of the anions leads to a three-dimensional framework structure with channels extending along [110] and [010] in which the ammonium cations and the water mol-ecules are located. N-H?O and O-H?O hydrogen bonding between the cations and water mol-ecules and the uncoordinating O atoms of the carboxyl-ate groups consolidates the crystal packing.

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| S-EPMC3379128 | biostudies-literature

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catena-Poly[bis-(4-amino-pyridinium) [[tetra-aqua-nickel(II)]-?-benzene-1,2,4,5-tetra-carboxyl-ato] dihydrate].

Project description:The asymmetric unit of the title compound, {(C(5)H(7)N(2))(2)[Ni(C(10)H(2)O(8))(H(2)O)(4)]·2H(2)O}(n), contains an Ni(II) atom, two water mol-ecules of coordination, one half of a benzene-1,2,4,5-tetra-carboxyl-ate (btec) anionic ligand, one 4-amino-pyridinium cation (papy) and an uncoordinated water mol-ecule. The metal center lies on an inversion center and adopts an octa-hedral geometry with the carboxyl-ate groups tilted out of the mean plane formed by the btec. In the crystal, mol-ecules are linked into one-dimensional coordination polymers running along the ac diagonal. The crystal structure is consolidated by N-H?O and O-H?O hydrogen bonds.

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