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Hydrogenation

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Hydrogenation. Wilkinson’s Catalyst. Activity:. Selectivity:. Directing Effects. Group binding affinities: amide > OH > OR > ester ~ ketone. Ru Heterolytic H 2 Activation. Lanthanide Hydrogenation Catalysts.

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Hydrogenation

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Presentation Transcript

  1. Hydrogenation

  2. Wilkinson’s Catalyst

  3. Activity:

  4. Selectivity:

  5. Directing Effects Group binding affinities: amide > OH > OR > ester ~ ketone

  6. RuHeterolytic H2 Activation

  7. Lanthanide Hydrogenation Catalysts Tobin Marks reported the extraordinary activity of (Cp*2LuH)2 for the hydrogenation of alkenes and alkynes. The monometallic complex catalyzes the hydrogenation of 1-hexene with a TOF = 120,000 hr-1 at 1 atm H2, 25ºC!! This is one of the most active hydrogenation catalysts known.

  8. Asymmetric Hydrogenation

  9. Other H-X additions: Hydrosilylation and Hydrocyanation

  10. Hydrocyanation (addition of H-CN)

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