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/987654321/14760
|
題名: | Reversible Carbon-hydrogen Bond Oxidative Addition Across a W—W Multiple Bond |
作者: | Chisholm, Malcolm H.;Huang, Jui-Hsien;Huffman, John C. |
貢獻者: | 化學系 |
日期: | 1997-02
|
上傳時間: | 2012-12-10T01:39:19Z
|
出版者: | Elsevier |
摘要: | As previously reported, the reaction between W2(NMe2)6 and 2,2′-methylenebis(6-tert-butyl-4-methyl-phenol), HO-CH2-OH, in hydrocarbon solvents leads to W2(μ-H)(μ-NMe2)(η2-O-CH2-O)(η3-O-CH-O)(HNMe2)(NMe2), 1, by oxidative cyclometallation to the ditungsten center. Upon heating 1 to greater than 60°C under dynamic vacuum W2(NMe2)2(η2-O-CH2-O)2,2, is formed with elimination of HNMe2. Compound 2 is proposed to have an ethane-like O2NWWO2N core based on NMR data. Addition of HNMe2 to 2 at room temperature converts 2 to 1. The addition of other neutral ligands (pyridine, PMe3) to hydrocarbon solutions of 2 promotes the C-H oxidative addition to the W2 center and the pyridine adduct W2(μ-H)(μ-NMe2)(NMe2)(py)(η2-O-CH2-O)(η3-O-CH-O), 3, has been fully characterized by an X-ray study. Addition of PMe3 to 2 at low temperatures reveals that Lewis base association occurs prior to C-H activation. There is no evidence for an agostic interaction for 2 by NMR or IR spectroscopy. |
關聯: | Journal of Organometallic Chemistry, 528(1-2): 221-223 |
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 | 582 | 檢視/開啟 |
|
在NCUEIR中所有的資料項目都受到原著作權保護.
|