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Abstract
The tris-palladium tripodal N-heterocyclic carbene (NHC) complexes (timtebtBu){Pd(ICy)I2}3 (4a), (timteb tBu){Pd(PPh3)I2}3 (5a), and (timtebdipp){Pd(PPh3)I2}3 (5b) (timtebtBu = 1,3,5-{tris(tert-butylimidazol-2-ylidene)methyl}-2,4,6- triethylbenzene, 3a; ICy = 1,3-dicyclohexylimidazol-2-ylidene; timteb dipp = 1,3,5-{tris({2,6-diisopropylphenyl}imidazol-2-ylidene)methyl}- 2,4,6-triethylbenzene, 3b) were prepared by reaction of Pd(II) precursors with either the free carbenes or imidazolium salts. Treatment of [Cu(NCMe) 4]X (X = PF6, BF4) with 3a or 3b produced the tris-copper(I) bridged complexes [(timtebR) Cu3(3-O)]X (R = tBu, X = PF6, 6a; R = dipp, X = BF4, 6b). Complexes 4a, 5a, and 6a were structurally characterized. The palladium complexes were tested as catalysts for Suzuki-Miyaura and Sonogashira coupling reactions and the copper species also employed for the Sonogashira reaction, as well as for the Ullmann-type arylation of imidazoles and phenols.
Original language | English |
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Pages (from-to) | 4097-4104 |
Number of pages | 8 |
Journal | Organometallics |
Volume | 29 |
Issue number | 18 |
DOIs | |
Publication status | Published - 27 Sept 2010 |
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Dive into the research topics of 'Tripodal N-heterocyclic carbene complexes of palladium and copper: Syntheses, characterization, and catalytic activity'. Together they form a unique fingerprint.Projects
- 1 Finished
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500 MHZ NMR SPECTROMETER TO SUPPORT ORGANIC, BIO-ORGANIC AND INORGANIC CHEMISTRY
Whittlesey, M. (PI), Danson, M. (CoI), Frost, C. (CoI), Kohn, R. (CoI), Lowe, J. (CoI), Weller, A. (CoI) & Williams, J. (CoI)
Engineering and Physical Sciences Research Council
12/06/06 → 11/06/09
Project: Research council