| Synthesis and Crystal Structure of a New Lanthanum(III) 4-Cyanobenzoate Complex |
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| 作者姓名： | LI Guo-Qinga LI Yanb c ZOU Wen-Qiangb c CHEN Qi-Yongb c ZHENG Fa-Kunb GUO Guo-Congb a |
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| 作者单位： | LI Guo-Qinga LI Yanb，c ZOU Wen-Qiangb，c CHEN Qi-Yongb，c ZHENG Fa-Kunb GUO Guo-Congb a (Chemistry and Life Science School，Quanzhou Normal University，Quanzhou，Fujian 362000，China) b (State Key Laboratory of Structural Chemistry，Fujian Institute of Research on the Structure of Matter，The Chinese Academy of Sciences，Fuzhou，Fujian 350002，China) c (Graduate School of the Chinese Academy of Sciences，Beijing 100039，China) |
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| 基金项目： | This work was supported by the National Natural Science Foundation of China (20671091)，Natural Science Foundation of Fujian Province (A0420002 and 2005I017) |
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| 摘 要： | A new dinuclear La(III) complex La2(4-cba)4H(4-cba)2]2(phen)2(H2O)4] (4-Hcba = 4-cyanobenzoic acid and phen = 1,10-phenanthroline) 1 has been synthesized by solvothermal reaction in an ethanol/water mixed solution at 100 ℃ and structurally characterized by single- crystal X-ray diffraction. Crystallographic data: C88H58La2N12O20, Mr = 1881.28, triclinic P1, a = 7.518(3), b = 17.033(6), c = 17.551(6), α = 115.333(4), β = 92.9910(10), γ = 99.366(5)°, V = 1985.3(12)3, Z = 1, Dc = 1.574 g/cm3, F(000) = 944 μ = 1.145 mm–1, the final R = 0.0281 and wR = 0.0686 for 6708 reflections with I > 2σ(I). In 1, two nine-coordinated La(III) ions are connected by two 4-cba ligands in a syn-syn bidentate coordination mode, and the other six 4-cba ligands terminate the La(III) ions, resulting in an isolated dinuclear structure. Two different types of intramolecular hydrogen bonds, asymmetrical O-H…O and symmetrical O…H…O, exist in the crystal. The title complex molecules are connected through hydrogen bonds and weak π-π stacking interactions to generate a 2-D layered network. The thermogravimetric analysis of 1 has also been discussed.
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Synthesis and Crystal Structure of a New Lanthanum(III) 4-Cyanobenzoate Complex |
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| LI Guo-Qinga LI Yanb,c ZOU Wen-Qiangb,c CHEN Qi-Yongb,c ZHENG Fa-Kunb GUO Guo-Congb a.Synthesis and Crystal Structure of a New Lanthanum(III) 4-Cyanobenzoate Complex[J].Chinese Journal of Structural Chemistry,2007(5). |
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| Authors: | LI Guo-Qinga LI Yanb c ZOU Wen-Qiangb c CHEN Qi-Yongb c ZHENG Fa-Kunb GUO Guo-Congb a |
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| Abstract: | A new dinuclear La(III) complex La2(4-cba)4H(4-cba)2]2(phen)2(H2O)4] (4-Hcba = 4-cyanobenzoic acid and phen = 1,10-phenanthroline) 1 has been synthesized by solvothermal reaction in an ethanol/water mixed solution at 100 ℃ and structurally characterized by single- crystal X-ray diffraction. Crystallographic data: C88H58La2N12O20, Mr = 1881.28, triclinic P1, a = 7.518(3), b = 17.033(6), c = 17.551(6), α = 115.333(4), β = 92.9910(10), γ = 99.366(5)°, V = 1985.3(12)3, Z = 1, Dc = 1.574 g/cm3, F(000) = 944 μ = 1.145 mm–1, the final R = 0.0281 and wR = 0.0686 for 6708 reflections with I > 2σ(I). In 1, two nine-coordinated La(III) ions are connected by two 4-cba ligands in a syn-syn bidentate coordination mode, and the other six 4-cba ligands terminate the La(III) ions, resulting in an isolated dinuclear structure. Two different types of intramolecular hydrogen bonds, asymmetrical O-H…O and symmetrical O…H…O, exist in the crystal. The title complex molecules are connected through hydrogen bonds and weak π-π stacking interactions to generate a 2-D layered network. The thermogravimetric analysis of 1 has also been discussed. |
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| Keywords: | lanthanum(III) complex 4-cyanobenzoic acid crystal structure hydrogen bonds |
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