English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 6507/11669
造訪人次 : 29727856      線上人數 : 570
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/987654321/18919

題名: Synthesis, Structural Characterization, Computational Study, and Catalytic Activity of Metal Complexes based on Tetradentate Pyridine/N-heterocyclic Carbene Ligand
作者: Chiu, Pei-Ling;Lai, Chun-Liang;Chang, Chiung-Fang;Hu, Ching-Han;Lee, Hon Man
貢獻者: 化學系
日期: 2005-12
上傳時間: 2014-08-14T04:29:03Z
出版者: American Chemical Society
摘要: The ligand precursor [LH2]2+·2Br- (1) for the bis(NHC) ligand with N-picolyl moieties is synthesized in 83% yield. Complexation of 1 with palladium and nickel acetates produced [PdL]2+·2Br- (2) and [NiL]2+·2Br- (3), respectively, in quantitative yields. Metathesis reactions of 2 and 3 with AgPF6 give the corresponding bromide-free complexes [PdL]2+·2PF6- (4) and [NiL]2+·2PF6- (5). Complexes 2−4 were characterized by X-ray structural determinations, which reveal a highly twisted helical coordination of L around the metal ions. In solution, however, the tetradentate chelate ring undergoes a rapid fluxional process of ring twisting. A theoretical study confirms that the tetradentate coordination of L in 2 and 3 is energetically more favorable than the bidentate chelation mode with dangling picolyl groups. A preliminary application of [NiL]2+·2Br- in Suzuki coupling of aryl halides with phenylboronic acid shows effective activity.
關聯: Organometallics, 24(25): 6169-6178
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.html0KbHTML618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