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The synthesis, characterization, and catalytic properties of (κ2 − C,N)-palladacycles with N-heterocyclic carbene-based ancillary ligands

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Novel five-membered (κ2−C,N) -palladacyclic complexes were prepared from the reaction of the corresponding acetate-bridged palladacycle dimer with N-heterocyclic carbene (NHC) ligands in high yields. Palladacyclic complexes (3) were fully characterized by elemental analysis and 1H and 13C NMR spectroscopy. Palladacyclic complexes were tested as catalyst for the C–C bond forming reaction. These complexes were found to be efficient catalysts for the Suzuki–Miyaura reaction of aryl bromides. |