Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume -, Issue 12, Pages 1937-1952Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201001318
Keywords
Palladium; Homogeneous catalysis; N-Heterocyclic carbenes; Nitrogen heterocycles; Ligand effects
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Funding
- Australian Research Council
- Gledden Trust
- Curtin University
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New mono- and bidentate N-heterocyclic carbene (NHC) silver and palladium complexes bearing benzimidazolin-2-ylidene ligands have been synthesized and structurally and spectroscopically characterised. The NHC ligands are decorated with bulky substituents on the nitrogen atoms and electron-donating butoxy groups on the benzo-fused ring, with the aim of enhancing the ability of their complexes as catalysts. The two types of palladium complexes presented, which possess either a bidentate bis(NHC) or a mixed NHC/allyl ligand system, demonstrate significantly different activities in the Mizoroki-Heck cross-coupling reactions but similar activities in the Suzuki-Miyaura and Buchwald-Hartwig reactions. Interesting behaviour of the mixed NHC/allyl palladium complexes in solution has been investigated.
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