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Poly[di-?9-citrato-tetra-sodiumzinc].

ABSTRACT: In the title compound, [Na4Zn(C6H5O7)2] n , the Zn(II) ion lies on an inversion center and is coordinated by six O atoms from two citrate ligands, forming a distorted octa-hedral geometry. There are two crystallographically independent Na(+) cations in the asymmetric unit. One Na(+) cation exhibits a distorted square-pyramidal geometry defined by five O atoms from four citrate ligands. The other Na(+) cation is surrounded by six O atoms from five citrate ligands in a distorted octa-hedral geometry. The Na(+) cations are bridged by citrate carboxyl-ate groups, forming a layer parallel to (100). The layers are further assembled into a three-dimensional network with the [Zn(citrate)2](4-) building units as 'pillars'; O-H?O hydrogen bonds also stabilize the structure.

SUBMITTER: Ma YH

PROVIDER: S-EPMC3885003 | biostudies-literature | 2013 Nov

REPOSITORIES: biostudies-literature

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Poly[di-μ9-citrato-tetra-sodiumzinc].

Ma Yu-Hong YH Yang Hong-Wei HW Hao Jing-Tuan JT Ma Pi-Zhuang PZ Yao Ting T

Acta crystallographica. Section E, Structure reports online 20131120 Pt 12

In the title compound, [Na4Zn(C6H5O7)2] n , the Zn(II) ion lies on an inversion center and is coordinated by six O atoms from two citrate ligands, forming a distorted octa-hedral geometry. There are two crystallographically independent Na(+) cations in the asymmetric unit. One Na(+) cation exhibits a distorted square-pyramidal geometry defined by five O atoms from four citrate ligands. The other Na(+) cation is surrounded by six O atoms from five citrate ligands in a distorted octa-hedral geomet ...[more]

PMID: 24454178

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Poly[di-?(9)-citrato-cobalt(II)tetra-sodium].

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| S-EPMC3344400 | biostudies-literature

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| S-EPMC3238635 | biostudies-literature

Poly[tetra-aqua-di-μ(4)-malonato-barium(II)cadmium(II)].

Project description:In the title complex, [BaCd(C(3)H(2)O(4))(2)(H(2)O)(4)](n), the Ba(II) atoms, located on crystallographic twofold axes, adopt slightly distorted square-anti-prismatic coordination geometries, while the Cd(II) atoms, which lie on crystallographic centres of symmetry, have a distorted octa-hedral coordination. Each malonate dianion binds two different Cd(II) atoms and two different Ba(II) atoms. This connectivity generates alternating layers along [100] in the structure, with one type containing Cd(II) cations and malonate dianions, while the other is primarily composed of Ba(II) ions and coordinated water mol-ecules. The water mol-ecules also participate in extensive O-H⋯O hydrogen bonding.

| S-EPMC3050201 | biostudies-literature

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