Citation: CHEN Hui-Fen, WANG Shuai-Hua, XU Zhong-Ning, WANG Guan-E, WANG Ming-Sheng, GUO Guo-Cong. Syntheses and Crystal Structures of Two Europium(Ⅲ) and Terbium(Ⅲ) Complexes with 6,7-Dicyanodipyridoquinoxaline[J]. Chinese Journal of Inorganic Chemistry, ;2012, 28(12): 2558-2564. shu

Syntheses and Crystal Structures of Two Europium(Ⅲ) and Terbium(Ⅲ) Complexes with 6,7-Dicyanodipyridoquinoxaline

1.
1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China;

Corresponding author: WANG Ming-Sheng,
Received Date: 24 December 2011
Available Online: 8 August 2012
Fund Project: 国家自然科学基金(No.90922013,21101152,90922035) (No.90922013,21101152,90922035)福建省杰出青年基金(No.2011J06006)资助项目. (No.2011J06006)

Two lanthanide^Ⅲ metal-organic complexes, [Eu(DICNQ)₂(NO₃)₃]·(CH₃CN)₂ (1) and [Tb(DICNQ)(NO₃)₃]₂ (2), were prepared from Eu(NO₃)₃·6H₂O and Tb(NO₃)₃·6H₂O with 6,7-dicyanodipyridoquinoxaline (DICNQ) by solvothermal reactions, respectively, and characterized by single-crystal X-ray diffraction analyses. Compound 1 crystallizes in the monoclinic noncentrosymmetric space group Cc, with a=1.157 7(6) nm, b=3.193 4(2) nm, c=1.106 6(6) nm, β=97.633(2)°, V=4.055(4) nm³, Z=4, M_r=984.63, D_c=1.613 g·cm^-3, μ=1.623 mm^-1, F(000)=1 952, S=1.035 and T=293(2) K. The final R=0.033 5 and wR=0.078 1 for 6 467 observed reflections with I>2σ(I). Compound 2 crystallizes in the triclinic centrosymmetric space group P1, with a=0.871 1(3) nm, b=0.890 8(3) nm, c=1.544 9(5) nm, α=80.852(9)°, β=84.217(9)°, γ=65.475(7)°, V=1.076 0(6) nm³, Z=1, M_r=1 254.44, D_c=1.936 g·cm^-3, μ=3.356 mm^-1, F(000)=604, S=1.026 and T=293(2) K. The final R=0.036 8 and wR=0.095 6 for 3 697 observed reflections with I>2σ(I). Compound 1 is built upon isolated neutral molecules, which are connected by C-H…O hydrogen-bonding interactions, while compound 2 forms a packing structure by π…π stacking interactions as well as intermolcular C-H…N and intramolecular C-H…O hydrogen-bonding interactions. CCDC: 857317, 1; 857318, 2.
- crystal structure;hydrogen-bonding interactions;metal-organic complexes;π…π stacking interactions
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