| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 50025 | Catalysis Communications | 2014 | 4 Pages |
•Ion-pair synergetic effect of the phosphino-imidazolium salts in Rh(III)-complex.•Hydroformylation in water suspension.•Phosphino-imidazolium salts.
A series of phosphino-imidazolium salts (1–4), which are composed of the phosphine-incorporated imidazolium cations and the corresponding counter-anions of PF6−, TfO−, and BF4−, are used in Rh-catalyzed hydroformylation. It was found that when the ionic Rh(III)-complex (1A, [RhIIICl4(L)2]PF6, L = 1-butyl-2-diphenylphosphino-3-methylimidazolium) was used as the pre-catalyst for hydroformylation of 1-octene, its inert catalytic activity could be efficiently tailored by the ion-pair synergetic effect of ligand 1–4 in water suspension. The single crystal structures of 1, 2, and 4 indicate that the hydrogen bonding network is developed between the cation and anion of ion-pairs 1 and 4, but is completely non-inexistent in 2.
Graphic abstractFigure optionsDownload full-size imageDownload as PowerPoint slide
