Synthesis, Characterization, and Hydrolysis of Aluminum(III) Compounds Bearing the C6F5-Substituted 
详细信息 查看全文
详细信息 查看全文
- 作者：Zhi Yang ; Hongping Zhu ; Xiaoli Ma ; Jianfang Chai ; Herbert W. Roesky ; Cheng He ; Jö ; rg Magull ; Hans-Georg Schmidt ; and Mathias Noltemeyer
- 刊名：Inorganic Chemistry
- 出版年：2006
- 出版时间：February 20, 2006
- 年：2006
- 卷：45
- 期：4
- 页码：1823 - 1827
- 全文大小：112K
- 年卷期：v.45,no.4(February 20, 2006)
- ISSN：1520-510X
文摘
A series of Al(III) compounds containing the C6F5-substituted 
-diketiminate ligands LAlMeCl (2), LAlMe2 (3), LAlMeI(4), and LAlBr2 (5) (L = HC[(CMe)(NC6F5)]2) were synthesized and characterized. The hydrolysis of 2 and 4 in thepresence of 1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene as the hydrogen halide acceptor both lead to (LAlMe)2(
-O) (6), a methylalumoxane derivative, which is the first hydrolysis product with the general formula of (RAlMe)nO.A comparison of the hydrolysis products of 2 and 4 with that of L'AlMeCl (L' = HC[(CMe)(NAr)]2, Ar = 2,6-iPr2C6H3) shows that with the C6F5-substituted -diketiminate ligand, it was not possible to generate LAlMe(OH).This is obviously due to the stronger Brönsted acidity of the proton and the smaller size of the C6F5 group in thiscompound compared to that of the corresponding 2,6-iPr2C6H3 derivative.
-diketiminate ligands LAlMeCl (2), LAlMe2 (3), LAlMeI(4), and LAlBr2 (5) (L = HC[(CMe)(NC6F5)]2) were synthesized and characterized. The hydrolysis of 2 and 4 in thepresence of 1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene as the hydrogen halide acceptor both lead to (LAlMe)2(-O) (6), a methylalumoxane derivative, which is the first hydrolysis product with the general formula of (RAlMe)nO.A comparison of the hydrolysis products of 2 and 4 with that of L'AlMeCl (L' = HC[(CMe)(NAr)]2, Ar = 2,6-iPr2C6H3) shows that with the C6F5-substituted -diketiminate ligand, it was not possible to generate LAlMe(OH).This is obviously due to the stronger Brönsted acidity of the proton and the smaller size of the C6F5 group in thiscompound compared to that of the corresponding 2,6-iPr2C6H3 derivative.