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Synthesis and Reactivity of Ru(PPh3)3(CO)HF and the N-Heterocyclic Carbene Derivatives Ru(NHC)(PPh3)2(CO)HF


Reference:

Reade, S. P., Nama, D., Mahon, M. F., Pregosin, P. S. and Whittlesey, M. K., 2007. Synthesis and Reactivity of Ru(PPh3)3(CO)HF and the N-Heterocyclic Carbene Derivatives Ru(NHC)(PPh3)2(CO)HF. Organometallics, 26 (14), pp. 3484-3491.

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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.

Details

Item Type Articles
CreatorsReade, S. P., Nama, D., Mahon, M. F., Pregosin, P. S. and Whittlesey, M. K.
Uncontrolled Keywordsfluorohydrido 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)
DepartmentsFaculty of Science > Chemistry
RefereedYes
StatusPublished
ID Code4543

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