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Neutral or anionic

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Novel Water-Soluble N-Heterocyclic Carbene Chelates for Transition Metal Catalysts Dr. Elizabeth T. Papish , Dept. of Chemistry, Drexel University Transfer Hydrogenation achieved with Ttz and NHC Ligands :.

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Novel Water-Soluble N-Heterocyclic CarbeneChelates for Transition Metal Catalysts Dr. Elizabeth T. Papish, Dept. of Chemistry, Drexel UniversityTransfer Hydrogenation achieved with Ttz and NHC Ligands:
  • NHCcomplexes give faster catalysis w/ most substrates than Ttz complexes, however Ttz complexes perform better than similar RuTp complexes in the literature
  • Catalysts are robust and air stable, high % conversions, good functional group tolerance
  • Complexes with pendant ether and alcohol groups synthesized, may provide H+ relay sites or hemi-labile groups. Similarly uncoordinated triazole in Ttz, can be a pendant base.
  • Future goals: enantioselectivity, H bonds closer to the metal, use of H2 gas
  • 2˚ or 3˚ amine
  • Neutral or anionic
  • Bidentate or tridentate
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