Abstract
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]PF 6, 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.
| Original language | English |
|---|---|
| Pages (from-to) | 5-8 |
| Number of pages | 4 |
| Journal | Catalysis Communications |
| Volume | 50 |
| DOIs | |
| State | Published - 5 May 2014 |
Keywords
- 1-Octene
- Hydroformylation
- Imidazolium salts
- Phosphines
- Rhodium complexes