Abstract
Transmetalation of the structurally characterized silver N-heterocyclic carbene (NHC) salt [Ag(IpFMe)2]+ (1, IpFMe = 1-pentafluorobenzyl-3-methylimidazol-2-ylidene) to [Rh(COD)Cl]2 affords Rh(IpFMe)(COD)Cl (2) in 95% yield. The analogous neutral iridium complex, Ir(IpFMe)(COD)Br (5), may be formed upon elimination of MeOH from [Ir(COD)(OMe)]2 in the reaction with 1-pentafluorobenzyl-3-methylimidazolium bromide in 47% yield. Thermolysis of [Ag(IpFMe)2]+ with either 5 or [Ir(COD)Cl]2 yields the cationic bis-NHC complex [Ir(IpFMe)2(COD)](AgX2) (X = Cl, Br), which exists as a mixt. of conformers in soln. [Ir(IpFMe)2(COD)](AgBr2) (6) was isolated in 55% yield by reaction of 1 with 5. Addn. of CO or AgOTf to 2 gives Rh(IpFMe)(CO)2Cl (3) in 72% yield and Rh(IpFMe)(COD)(OTf) (4) in 85% yield, resp. The mol. structures of compds. 1-6 have been detd. by x-ray crystallog.
| Original language | English |
|---|---|
| Pages (from-to) | 3761-3767 |
| Number of pages | 7 |
| Journal | Organometallics |
| Volume | 25 |
| Issue number | 15 |
| Publication status | Published - 2006 |
Keywords
- iridium cyclooctadienyl fluorinated bisimidazolylidene carbene complex prepn
- Through-space interaction (NMe/CH2C6F5 and NMe/o-C6F5 interactions
- Through-space interaction (silver-silver
- rhodium
- Bond length (carbon-metal
- Transition metal complexes Role
- prepn. and properties of neutral and cationic fluorinated N-heterocyclic carbene complexes of rhodium and iridium)
- Transmetalation (prepn. and properties of neutral and cationic fluorinated N-heterocyclic carbene complexes of rhodium and iridium)
- Crystal structure
- rhodium fluorinated bisimidazolylidene carbene complex cyclooctadienyl triflate carbonyl prepn
- crystal structure pentafluorobenzyl methylimidazol silver cyclooctadienyl carbonyl rhodium iridium
- Coordination number (four
- mol structure silver rhodium iridium pentafluorobenzyl methylimidazol cyclooctadienyl carbonyl
- RACT (Reactant or reagent) (carbene complexes
- PRP (Properties)
- RCT (Reactant)
- PREP (Preparation)
- Conformers
- Molecular rotation (lack of rotation about the Rh-carbene bond
- RACT (Reactant or reagent) (transition metal complexes
- neutral cationic rhodium iridium fluorinated imidazolylidene carbene complex prepn
- Molecular structure (of neutral and cationic fluorinated N-heterocyclic carbene complexes of rhodium and iridium)
- Carbene complexes Role
- silver pentafluorobenzyl methylimidazol carbene complex transmetalation cyclooctadienyl rhodium iridium
- SPN (Synthetic preparation)