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[Ru(NHC)(P-P)(CO)HF] (NHC=N-heterocyclic carbene; P-P=xantphos, dppf) complexes: Efforts to prepare new hydrodefluorination catalysts


Reference:

Guard, L. M., Ledger, A. E. W., Reade, S. P., Ellul, C. E., Mahon, M. F. and Whittlesey, M. K., 2011. [Ru(NHC)(P-P)(CO)HF] (NHC=N-heterocyclic carbene; P-P=xantphos, dppf) complexes: Efforts to prepare new hydrodefluorination catalysts. Journal of Organometallic Chemistry, 696 (3), pp. 780-786.

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http://dx.doi.org/10.1016/j.jorganchem.2010.09.077

Abstract

The ruthenium N-heterocyclic carbene (NHC) hydride fluoride complexes Ru(NHC)(P-P)(CO)HF (NHC=ICy (3), IEt2Me2 (5), P-P=xantphos; NHC=ICy (7), P-P=dppf) have been prepared by treatment of the corresponding dihydride complexes [Ru(NHC)(P-P)(CO)H2] (NHC=ICy (2), IEt2Me2 (4) P-P=xantphos; NHC=ICy (6), P-P=dppf) with Et3N3HF. In all cases, the hydride fluoride complexes exist in solution as two conformers or isomers. Although 3, 5 and 7 could be converted back to 2, 4 and 6, respectively, by heating with Et3SiH, efforts to generate a catalytic cycle for the hydrodefluorination of aromatic fluorocarbons by subsequent reaction of Ru(NHC)(P-P)(CO)H2 with C6F6 were prevented by the much more favourable cyclometallation of the carbene ligand.

Details

Item Type Articles
CreatorsGuard, L. M., Ledger, A. E. W., Reade, S. P., Ellul, C. E., Mahon, M. F. and Whittlesey, M. K.
DOI10.1016/j.jorganchem.2010.09.077
Uncontrolled Keywordsc-h activation, fluoride ligands, n-heterocyclic carbenes, ruthenium
DepartmentsFaculty of Science > Chemistry
RefereedYes
StatusPublished
ID Code21630

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