| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 40565 | Applied Catalysis A: General | 2013 | 8 Pages |
New quaternary ammonium salts containing unsaturated substituents (allyl or vinyl) were synthesized. All of them were subjected to spectroscopic, elemental and thermogravimetric analyses. The above compounds are ionic liquids (Tm < 100 °C) and were applied to immobilization of three rhodium(I) complexes [Rh(PPh3)3Cl], [{Rh(μ-Cl)(cod)}2] and [{Rh(μ-OSiMe3)(cod)}2] as well as three platinum complexes at different oxidation states [Pt(PPh3)4], K2[PtCl4] and K2[PtCl6]. Homogeneous catalytic systems were obtained and employed in the biphasic process of hydrosilylation of octene and allyl glycidyl ether with 1,1,1,3,5,5,5-heptamethyltrisiloxane. Catalytic activities of all the systems were compared and the best one was selected. The latter made it possible to recycle 10 times the same catalyst sample without a decrease in its activity and to easy separate the catalyst from the post-reaction mixture by decantation. The developed system is one of the most effective catalytic systems for hydrosilylation known to date.
Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (213 K)Download as PowerPoint slideHighlights► Unsaturated substituent-containing ammonium ionic liquids were synthesized. ► Rhodium and platinum complexes were immobilized in ammonium ionic liquids. ► A very efficient catalytic system for hydrosilylation was developed. ► TON as high as 98,200 was obtained. ► Multiple use of catalyst without activity decrease was achieved.
