The natural product lepidiline A as an N-heterocyclic carbene ligand precursor in complexes of the type [Ir(cod)(NHC)PPh3)]X: synthesis, characterisation, and application in hydrogen isotope exchange catalysis

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A range of iridium(I) complexes of the type [Ir(cod)(NHC)PPh3)]X are reported, where the N-heterocyclic carbene (NHC) is derived from the naturally-occurring imidaozlium salt, Lepidiline A (1,3-dibenzyl-4,5-dimethylimidazolium chloride). A range of complexes were prepared, with a number of NHC ligands and counter-ions, and various steric and electronic parameters of these complexes were evaluated. The activity of the [Ir(cod)(NHC)PPh3)]X complexes in hydrogen isotope exchange reactions was then studied, and compared to established iridium(I) complexes.
Original languageEnglish
Article number161
Number of pages11
Issue number2
Publication statusPublished - 1 Feb 2020


  • iridium
  • N-heterocyclic carbene
  • hydrogen isotope exchange
  • deuterium

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