Citation: WANG Zi-Liang, ZHAI Qiu-Ge. Hydrothermal Synthesis, Structural Investigation and Characterization of an Organic-inorganic Hybrid,[Co(BIIM)₃]₂H[BW₁₂O₄₀]·7H₂O[J]. Chinese Journal of Structural Chemistry, ;2014, 33(9): 1346-1352. shu

Hydrothermal Synthesis, Structural Investigation and Characterization of an Organic-inorganic Hybrid,[Co(BIIM)₃]₂H[BW₁₂O₄₀]·7H₂O

WANG Zi-Liang ^a,, ,
ZHAI Qiu-Ge ^b

1.
a College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China;
2.
b College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China

Corresponding author: WANG Zi-Liang,
Received Date: 18 December 2013
Available Online: 10 July 2014
Fund Project: Supported by the Natural Science Foundation of Henan Province (No. 102300410021) (No. 102300410021)

An organic-inorganic hybrid based on α-Keggin-typed[BW₁₂O₄₀]^5- anionic cluster,[Co(BIIM)₃]₂H[BW₁₂O₄₀]·7H₂O (BIIM=2,2'-biimidazole), was hydrothermally synthesized and structurally characterized by thermogravimetric analysis, IR and UV spectra. The title compound crystallizes in monoclinic, space group P2₁/n with a=12.3490(10), b=33.270(3), c=18.9660(16) Å, β=105.9950(10)°, V=7490.5(11) Å³, C₃₆H₅₀BCo₂N₂₄O₄₇W₁₂, M_r=3905.80, Dc=3.451g/cm³, μ(MoKα)=18.886 mm^-1, F(000)=6972, Z=4, S=1.004, the final R=0.0404 and wR=0.0914 for 14683 observed reflections (I > 2σ(I)). The compound consists of two isolated[Co(BIIM)₃]²⁺ cations and one[BW₁₂O₄₀]^5- anion, in which each Co²⁺ ion is coordinated by six N atoms from three BIIM ligands displaying a regular CoN₆ octahedron. These components are finally linked together via N-H…O_{(polyoxometalate and water)} hydrogen bonds into a two-dimensional framework. Full investigation of the intermolecular interactions by Hirshfeld surface and fingerprint plots clearly indicates that there are rare W-O_terminal…π_{imidazole ring} interactions which cooperate with the classical N-H…O hydrogen bonds to stabilize the structural packing.
- crystal structure,
- cobalt,
- Keggin,
- Hirshfeld surface,
- fingerprint plots
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