| Synthesis, Structure and Catalytic Activity Comparison of Tris- and Tetracoordinated Lanthanide Amides |
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| 作者姓名： | 谢美华 刘心元 王绍武 刘莉 吴勇勇 杨高升 周双六 盛恩宏 黄子祥 |
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| 作者单位： | [1]InstituteofOrganicChemistry,SchoolofChemistryandMaterialsScience,AnhuiNormalUniversity,Wuhu,Anhui241000,China [2]FujianInstituteofResearchontheStructureofMatters,ChineseAcademyofSciences,Fuzhou,Fujian,350002,China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Nos. 20072001 and 20271003)，the Excellent Young Scholars Foundation of Anhui Province and Education Department of Anhui Province. |
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| 摘 要： | Tetracoordinated lanthanide amides (MeaSi)2N]3Ln (μ-C1)Li(THF)3 (Ln=La (1), Pr (2)) were synthesized by the reaction of anhydrous lanthanide(Ⅲ) chlorides LnCl3 (Ln=La, Pr) with 3 equiv, of lithium bis(trimethylsilyl)amide (Me3Si)2NLi in THF, followed by recrystallization from toluene. Sublimation of 1 and 2 afforded the triscoordinate lanthanide amides (Me3Si)2N]3Ln (Ln=La, Pr). The crystal structure of 2 was determined by X-ray diffraction analysis. The catalytic activity studies show that the tetracoordinate amides can be used as single-component MMA (methyl methacrylate) polymerization catalysts, while the triscoordinate amides showed poor activity on MMA polymerization under the same conditions.
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| 关 键 词： | 合成 晶体结构 催化活性 镧系配合物 氨基化合物 聚合作用 |
Synthesis, Structure and Catalytic Activity Comparison of Tris-and Tetracoordinated Lanthanide Amides |
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| Mei‐Hua Xie,Xin‐Yuan Liu,Shao‐Wu Wang,Li Liu,Yong‐Yong Wu,Gao‐Sheng Yang,Shuang‐Liu Zhou,En‐Hong Sheng,Zi‐Xiang Huang.Synthesis, Structure and Catalytic Activity Comparison of Tris- and Tetracoordinated Lanthanide Amides[J].Chinese Journal of Chemistry,2004,22(7):678-682. |
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| Authors: | Mei‐Hua Xie Xin‐Yuan Liu Shao‐Wu Wang Li Liu Yong‐Yong Wu Gao‐Sheng Yang Shuang‐Liu Zhou En‐Hong Sheng Zi‐Xiang Huang |
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| Abstract: | Tetracoordinated lanthanide amides (Me3Si)2N]3Ln (m-Cl)Li(THF)3 (Ln=La (1), Pr (2)) were synthesized by the reaction of anhydrous lanthanide(III) chlorides LnCl3 (Ln=La, Pr) with 3 equiv. of lithium bis(trimethylsilyl)amide (Me3Si)2NLi in THF, followed by recrystallization from toluene. Sublimation of 1 and 2 afforded the triscoordinate lanthanide amides (Me3Si)2N]3Ln (Ln=La, Pr). The crystal structure of 2 was determined by X-ray diffraction analysis. The catalytic activity studies show that the tetracoordinate amides can be used as single-component MMA (methyl methacrylate) polymerization catalysts, while the triscoordinate amides showed poor activity on MMA polymerization under the same conditions. |
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| Keywords: | synthesis lanthanide catalyst MMA polymerization |
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