Citation: XIA Chang-Kun, WU Xiao-Yuan, WU Ding-Ming, LU Can-Zhong. Synthesis and Crystal Structure of a Cobalt(Ⅱ) Complex Based on 2,2'-Bibenzimidazole and N,N-bis(phosphonomethyl)aminoacetic Acid[J]. Chinese Journal of Structural Chemistry, ;2015, 34(12): 1883-1888. doi: 10.14102/j.cnki.0254-5861.2011-0767 shu

Synthesis and Crystal Structure of a Cobalt(Ⅱ) Complex Based on 2,2'-Bibenzimidazole and N,N-bis(phosphonomethyl)aminoacetic Acid

XIA Chang-Kun ^a,b ,
WU Xiao-Yuan ^a,b ,
WU Ding-Ming ^a,b ,
LU Can-Zhong ^a,b,,

a.
a. Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China;
b.
b. Fujian Provincial Key Laboratory of Nanomaterials, Fuzhou 350002, China

Corresponding author: LU Can-Zhong,
Received Date: 5 April 2015
Available Online: 13 July 2015
Fund Project: This work was supported by the National Natural Science Foundation of China (21373221, 21221001, 91122027, 51172232, 21403236) (21373221, 21221001, 91122027, 51172232, 21403236)

The title complex, [Co₂(bibzim)(H₂bibzim)₄]·[Co₂(H₂bibzim)₂(Hbibzim)(HL)]₂·2H₂O (1) (H₂bibzim=2,2'-bibenzimidazole, H₅L=N,N-bis(phosphonomethyl)aminoacetic acid (HO₂CCH₂N(CH₂PO₃H₂)₂)), was synthesized with hydrothermal reactions. The compound crystallizes in triclinic, space group P1 with a=13.71020(10), b=14.9165(5), c=20.9924(5) Å, α=86.344(9), β=71.214(8), γ=73.757(7)°, C₁₆₂H₁₂₄Co₆N₄₆O₁₈P₄, M_r=3478.52, V=3900.55(16) Å³, Z=2, D_c=1.482 g/cm³, μ(MoKα)=0.747 mm^-1, F(000)=1784, the final R=0.0777 and wR=0.2091 for 13598 observed reflections (I>2σ(I)). X-ray diffraction analysis reveals that there are three crystallographically independent Co(Ⅱ) atoms in the complex. The complex consists of binuclear coordination cation, binuclear coordination anion, as well as lattice water molecules, which further aggregate into a 3D framework via hydrogen bonding as well as π-π interactions.
- crystal engineering,
- hydrogen bonding interactions,
- 2,2'-bibenzimidazole,
- cobalt compound
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