Abstract
The reaction of Ru(PPh3)3(CO)H2 with excess Et3N.3HF at elevated temp. affords the hydride fluoride complex Ru(PPh3)3(CO)HF (1). This reacts with N-heterocyclic carbenes (NHCs) at ambient temp. to form the mono-NHC products Ru(NHC)(PPh3)2(CO)HF (NHC = IMe4 (2), IEt2Me2 (3), ICy (4), IiPr2Me2 (5)). Complexes 2-4 convert from the trans- to cis-phosphine isomers in soln. over weeks (relative rates 2 > 3 .mchgt. 4), while 5 undergoes both isomerization and disproportionation to yield cis-Ru(IiPr2Me2)(PPh3)2(CO)HF (6), 1, and Ru(IiPr2Me2)2(PPh3)(CO)HF (7) in a matter of hours. The mol. structures of compds. 1-4 were detd. by x-ray crystallog.
| Original language | English |
|---|---|
| Pages (from-to) | 3484-3491 |
| Number of pages | 8 |
| Journal | Organometallics |
| Volume | 26 |
| Issue number | 14 |
| Publication status | Published - 2007 |
Keywords
- fluorohydrido ruthenium triphosphine substitution reaction dihydroimidazole ligand
- mol structure heterocyclic carbene imidazolidene ruthenium phosphine fluorohydride
- Substitution reaction (substitution reaction of fluorohydridoruthenium tris(phosphine) complex with dihydroimidazole derivs. to give heterocyclic carbene (imidazolidene)ruthenium fluorohydride complexes)
- imidazolideneruthenium fluorohydride prepn isomerization
- (imidazolidene)ruthenium bisphosphine fluorohydride)
- crystal structure
- Isomerization
- Carbenes Role
- RCT (Reactant)
- PREP (Preparation)
- Crystal structure
- RACT (Reactant or reagent) (substitution reaction of fluorohydridoruthenium tris(phosphine) complex with dihydroimidazole derivs. to give heterocyclic carbene (imidazolidene
- Molecular structure (of heterocyclic carbene complexes
- SPN (Synthetic preparation)