Phosphines with 2-imidazolium ligands enhance the catalytic activity and selectivity of rhodium complexes for hydrosilylation reactions
作者:Jiayun Li、Jiajian Peng、Ying Bai、Guodong Zhang、Guoqiao Lai、Xiaonian Li
DOI:10.1016/j.jorganchem.2009.10.029
日期:2010.2
with 2-imidazolium ligands can specifically vary their physical and chemical properties by altering the attached substituents. Rhodiumcomplexes (1b–7b) exhibited excellent catalytic activity and selectivity for hydrosilylation of olefins. The selectivity of the β-adduct clearly increased when the length of the alkyl chain bound to the imidazolium cation increased. Rhodiumcomplex 1b in BMimPF6 can
Hydrosilylation Catalyzed with Rh(PPh<sub>3</sub>)<sub>3</sub>Cl/Ionic-Liquid–Functionalized SiO<sub>2</sub>
作者:Jiayun Li、Jiajian Peng、Ying Bai、Yingqian Hu、Huayu Qiu、Guoqiao Lai、Xiaonian Li
DOI:10.1080/10426500902823958
日期:2010.1.29
Ionic liquid-modified silica has been prepared by a oone-poto reaction of activated silica, 3-chloropropyltriethoxysilane, and alkylimidazole or pyridine. It was found that the catalytic activity and -adduct selectivity of the supported catalyst Rh(PPh3)3Cl/ionic-liquid-modified-SiO2 for the hydrosilylation reaction of alkenes with triethoxysilane was significantly improved. Furthermore, the catalyst system could be recovered easily.