Palladium-Mediated Ethylation of the Imidazolium Cation Monitored In Operando on a Solid Catalyst with Ionic Liquid Layer
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- 作者：Tanja Bauer ; Veit Hager ; Marc B. Williams ; Mathias Laurin ; Tibor Dö ; pper ; Prof. Dr. Andreas Gö ; rling ; Dr. Normen Szesni ; Prof. Dr. Peter Wasserscheid ; Prof. Dr. Marco Haumann and Prof. Dr. Jö ; rg Libuda
- 刊名：ChemCatChem
- 出版年：2017
- 出版时间：January 9, 2017
- 年：2017
- 卷：9
- 期：1
- 页码：109-113
- 全文大小：1322K
- ISSN：1867-3899
文摘
The ionic liquid 1-ethyl-3-methylimidazolium ethylsulfate [EMIM][EtOSO<sub>3sub>] was supported on Pd-Al<sub>2sub>O<sub>3sub> to yield a solid catalyst with ionic liquid layer (SCILL) material. During the hydrogenation of ethene, it was found that ethene was incorporated into the imidazolium moiety in a reaction catalyzed by the palladium surface. The formation of 1,2-diethyl-3-methylimidazolium ethylsulfate was confirmed ex situ by means of NMR spectroscopy. Moreover, the reaction itself could be monitored in situ by diffuse reflection infrared Fourier transformation (DRIFT) spectroscopy. A reaction mechanism involving surface carbene species was proposed on the basis of the analytical data.