English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 6507/11669
造訪人次 : 29621376      線上人數 : 291
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/987654321/14760

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.html0KbHTML582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