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Synthesis, Structure and Catalytic Activity Comparison of Tris-and Tetracoordinated Lanthanide Amides

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【作者】 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；

【Author】 XIE, Mei-Huaa LIU, Xin-Yuana WANG, Shao-Wu*,a,bLIU, Lia WU, Yong-YongaYANG, Gao-ShengaZHOU, Shuang-Liua SHENG, En-Honga HUANG, Zi-Xiangc a Institute of Organic Chemistry, School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000,China b State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China c Fujian Institute of Research on the Structure of Matters, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China

【机构】 Institute of Organic Chemistry； School of Chemistry and Materials Science； Anhui Normal University； Wuhu； Anhui 241000； China； China State Key Laboratory of Organometallic Chemistry； Shanghai Institute of Organic Chemistry； Chinese Academy of Sciences； Shanghai 200032； China； Fujian Institute of Research on the Structure of Matters； Fuzhou； Fujian； 350002； China；

【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.

【关键词】 synthesis； lanthanide； catalyst； MMA； polymerization；
【Key words】 synthesis； lanthanide； catalyst； MMA； polymerization；
【基金】 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.
  • 【文献出处】 Chinese Journal of Chemistry ,中国化学(英文版) , 编辑部邮箱 ,2004年07期
  • 【分类号】O643.3
  • 【被引频次】5
  • 【下载频次】10
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