National Changhua University of Education Institutional Repository : Item 987654321/14775
English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 6487/11649
造訪人次 : 29400007      線上人數 : 199
RC Version 3.2 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜尋範圍 進階搜尋

請使用永久網址來引用或連結此文件: http://ir.ncue.edu.tw/ir/handle/987654321/14775

題名: Hafnium Chloride and Hafnium Methyl Complexes Bearing Substituted Pyrrolyl Ligands: Synthesis, Characterization, and Ethylene Polymerization
作者: Hsieh, Kun-Chun;Chang, Jr-Chiuan;Lee, Ming-Tsung;Hu, Ching-Han;Hung, Chen-Hsiung;Lee, Hon-Man;Huang, Jui-Hsien;Wang, Mei-Hua;Lee, Ting-Yu
貢獻者: 化學系
關鍵詞: Hafnium;Pyrrole;Ethylene;Polymerization
日期: 2004-09
上傳時間: 2012-12-10T01:39:36Z
出版者: Elsevier
摘要: Reactions of HfCl4 with 2 and 3 equiv. of Li[C4H3N(CH2NMe2)-2] in toluene afford HfCl2[C4H3N(CH2NMe2)-2]2 (1) and HfCl[C4H3N(CH2NMe2)-2]3 (2), respectively. Transmetallation reaction of 1 with 2 equiv. of MeLi results in a hafnium dimethyl compound HfMe2[C4H3N(CH2NMe2)-2]2 (3). A variable-temperature 1H NMR spectroscopic study shows that the activation energy for the dissociation/association of the NMe2 units of compound 2 in solution is ca. 13.6 kcal/mol. Compounds 1–3 are characterized by NMR spectroscopy and single crystal X-ray diffraction. A polymerization study shows that compounds 1 and 3 exhibit moderate activity toward ethylene in the presence of TIBA and MAO.
The reactions of HfCl4 with 2 and 3 equiv. of Li[C4H3N(CH2NMe2)-2] afford HfCl2[C4H3N(CH2NMe2)-2]2 (1) and HfCl[C4H3N(CH2NMe2)-2]3 (2), respectively. Further reaction of 1 with MeLi results in a hafnium dimethyl compound HfMe2[C4H3N(CH2NMe2)-2]2 (3). A polymerization study shows that compounds 1 and 3 exhibit moderate activity toward ethylene in the presence of TIBA and MAO.
關聯: Inorg. Chim. Acta., 357(12): 3517-3524
顯示於類別:[化學系] 期刊論文

文件中的檔案:

檔案 大小格式瀏覽次數
index.html0KbHTML709檢視/開啟


在NCUEIR中所有的資料項目都受到原著作權保護.

 


DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回饋