Target of the present thesis was to investigate the potential of defined or
in situ-generated transition metal complexes as catalysts in the activation of “unreactive bonds” (C-H, C-Cl, C-F, C-O). Thus, iridium NHC complexes were prepared and employed successfully in the C-H borylation reaction of aromatic compounds. Nickel(II) complexes of strongly σ-donating quinolinylidene ligands were tested in the activation of aryl chlorides. In a comparative study, these nickel(II)quinolinylidene catalysts proved to be significantly more efficient than the corresponding nickel(II)imidazolinylidene complex. Activation of aryl fluorides and aryl chlorides was achieved in high yields by a catalyst generated in situ from nickelacetylacetonate and 1,3-dicyclohexylimidazolium chloride. Notably, this catalyst outperforms all known systems in the activation of aryl ethers. In conclusion, the present thesis clearly emphasises the potential of NHC ligands in the activation of “unreactive bonds”.
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Target of the present thesis was to investigate the potential of defined or
in situ-generated transition metal complexes as catalysts in the activation of “unreactive bonds” (C-H, C-Cl, C-F, C-O). Thus, iridium NHC complexes were prepared and employed successfully in the C-H borylation reaction of aromatic compounds. Nickel(II) complexes of strongly σ-donating quinolinylidene ligands were tested in the activation of aryl chlorides. In a comparative study, these nickel(II)quinolinylidene catalyst...
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