資料載入中.....
|
請使用永久網址來引用或連結此文件:
http://ir.ncue.edu.tw/ir/handle/987654321/14784
|
題名: | Synthesis and Characterization of Zirconium and Hafnium Aryloxide Compounds and Their Reactivity Towards Lactide and ϵ-Caprolactone Polymerization |
作者: | Hsieh, Kun-Chun;Lee, Wen-Yi;Hsueh, Li-Feng;Lee, Hon-Man;Huang, Jui-Hsien |
貢獻者: | 化學系 |
關鍵詞: | Hafnium aryloxide;Zirconium aryloxide;Lactide;Caprolactone;Hafnium;Zirconium |
日期: | 2006-06
|
上傳時間: | 2012-12-10T01:39:45Z
|
出版者: | Wiley-VCH Verlag GmbH & Co. KGaA |
摘要: | Reactions of 2 equiv. pyrrole with [C4H3N(CH2NMe2)-2]2M(NEt2)2 in toluene generated tetra-pyrrolyl metal compounds [C4H3N(CH2NMe2)-2]2M(C4H4N)2 (3, M = Zr; 4, M = Hf) in moderate yields. Similarly, treatment of metal amides [C4H3N(CH2NMe2)-2]2M(NEt2)2 with 2,6-dimethylphenol or 2,6-diisopropylphenol in heptane resulted in the elimination of diethylamine along with the formation of the corresponding metal alkoxides [C4H3N(CH2NMe2)-2]2M(OR)2 (5, M = Zr, R = C6H3-2,6-Me2; 6, M = Hf, R = C6H3-2,6-Me2; 7, M = Zr, R = C6H3-2,6-iPr2; 8, M = Hf, R = C6H3-2,6-iPr2) in moderate yields. All the new compounds were characterized by 1H and 13C NMR spectroscopy and the structures of 3, 4, 6, 7, and 8 have also been determined by X-ray crystallographic studies. The aryloxides and the substituted pyrrolyl ligands in both compounds 5 and 6 show fluxionality as observed by 1H NMR signals. A kinetic study on the ring-opening polymerization of lactide exhibits a first-order reaction of lactide monomer with compound 8. The catalytic properties of all the metal complexes have been studied for the ring-opening polymerization of ϵ-caprolactone. |
關聯: | European Journal of Inorganic Chemistry, 2006(11): 2306-2312 |
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.html | 0Kb | HTML | 644 | 檢視/開啟 |
|
在NCUEIR中所有的資料項目都受到原著作權保護.
|