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

Liu Z, Tian R, Mao R, Cao X, Wang F - Acta Crystallogr Sect E Struct Rep Online (2012)

Bottom Line: It is coordinated to the Co(2+) cation, and through an O-H⋯O hydrogen bond connected to a neighboring [Co(C(6)H(5)O(7))(2)](4-) building unit.The coordination modes of the carboxyl-ate O atoms vary, with one O atom being coordinated to three different Na(+) cations, three are bridging O atoms bound to two Na(+) cations and two are connected to a Co(2+) cation and a Na(+) cation, respectively.Through these inter-connections, the basic [Co(C(6)H(5)O(7))(2)](4-) building units are linked with each other through coordination of their carboxyl-ate groups to the Na(+) cations, forming a three-dimensional framework.

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Affiliation: Department of Materials and Chemical Engineering, Ministry of Education Key Laboratory of Advanced Materials of Tropical Island Resources, Hainan University, Haikou 570228, Hainan Province, People's Republic of China.

ABSTRACT
The title compound, [CoNa(4)(C(6)H(5)O(7))(2)](n), was obtained under hydro-thermal conditions as a minor product. The Co(2+) cation is located on a crystallographic inversion center and is coordinated by six O atoms from two different citrate units, forming a [Co(C(6)H(5)O(7))(2)](4-) building unit with Co-O bond lengths between 2.0578 (17) and 2.0813 (16) Å. The structure features two crystallographically independent Na(+) ions. The first Na(+) cation is five-coordinated by O atoms of five carboxylate groups from four different citrate anions. The second Na(+) cation is surrounded by six O atoms of five carboxylate groups from five different citrate anions. The carboxylate groups of the citrate are completely depronona-ted, the hydroxyl group, however, is not. It is coordinated to the Co(2+) cation, and through an O-H⋯O hydrogen bond connected to a neighboring [Co(C(6)H(5)O(7))(2)](4-) building unit. The coordination modes of the carboxyl-ate O atoms vary, with one O atom being coordinated to three different Na(+) cations, three are bridging O atoms bound to two Na(+) cations and two are connected to a Co(2+) cation and a Na(+) cation, respectively. Through these inter-connections, the basic [Co(C(6)H(5)O(7))(2)](4-) building units are linked with each other through coordination of their carboxyl-ate groups to the Na(+) cations, forming a three-dimensional framework.

No MeSH data available.


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A view of the packing along the a axis. Dashed lines indicate hydrogen bonds.
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Fap2: A view of the packing along the a axis. Dashed lines indicate hydrogen bonds.


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

Liu Z, Tian R, Mao R, Cao X, Wang F - Acta Crystallogr Sect E Struct Rep Online (2012)

A view of the packing along the a axis. Dashed lines indicate hydrogen bonds.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3344400&req=5

Fap2: A view of the packing along the a axis. Dashed lines indicate hydrogen bonds.
Bottom Line: It is coordinated to the Co(2+) cation, and through an O-H⋯O hydrogen bond connected to a neighboring [Co(C(6)H(5)O(7))(2)](4-) building unit.The coordination modes of the carboxyl-ate O atoms vary, with one O atom being coordinated to three different Na(+) cations, three are bridging O atoms bound to two Na(+) cations and two are connected to a Co(2+) cation and a Na(+) cation, respectively.Through these inter-connections, the basic [Co(C(6)H(5)O(7))(2)](4-) building units are linked with each other through coordination of their carboxyl-ate groups to the Na(+) cations, forming a three-dimensional framework.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Materials and Chemical Engineering, Ministry of Education Key Laboratory of Advanced Materials of Tropical Island Resources, Hainan University, Haikou 570228, Hainan Province, People's Republic of China.

ABSTRACT
The title compound, [CoNa(4)(C(6)H(5)O(7))(2)](n), was obtained under hydro-thermal conditions as a minor product. The Co(2+) cation is located on a crystallographic inversion center and is coordinated by six O atoms from two different citrate units, forming a [Co(C(6)H(5)O(7))(2)](4-) building unit with Co-O bond lengths between 2.0578 (17) and 2.0813 (16) Å. The structure features two crystallographically independent Na(+) ions. The first Na(+) cation is five-coordinated by O atoms of five carboxylate groups from four different citrate anions. The second Na(+) cation is surrounded by six O atoms of five carboxylate groups from five different citrate anions. The carboxylate groups of the citrate are completely depronona-ted, the hydroxyl group, however, is not. It is coordinated to the Co(2+) cation, and through an O-H⋯O hydrogen bond connected to a neighboring [Co(C(6)H(5)O(7))(2)](4-) building unit. The coordination modes of the carboxyl-ate O atoms vary, with one O atom being coordinated to three different Na(+) cations, three are bridging O atoms bound to two Na(+) cations and two are connected to a Co(2+) cation and a Na(+) cation, respectively. Through these inter-connections, the basic [Co(C(6)H(5)O(7))(2)](4-) building units are linked with each other through coordination of their carboxyl-ate groups to the Na(+) cations, forming a three-dimensional framework.

No MeSH data available.


Related in: MedlinePlus