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Matthew T Whited1, Wenlai Han1, Helen J Jin-Lee1

  • 1Department of Chemistry, Carleton College, 1N. College St., Northfield, MN 55057, USA.

Angewandte Chemie (International Ed. in English)
|May 10, 2022
PubMed
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This study introduces a novel cooperative catalysis method using a cobalt-silicon bond. This approach enables efficient group transfer by activating substrates at two distinct sites, preventing catalyst deactivation.

Area of Science:

  • Organometallic Chemistry
  • Catalysis
  • Materials Science

Background:

  • Cooperative catalysis offers enhanced reactivity and selectivity.
  • Metal-silicon bonds present unique opportunities for substrate activation.
  • Catalyst poisoning by competing substrates is a significant challenge in group-transfer reactions.

Purpose of the Study:

  • To demonstrate a new cooperative group-transfer catalysis strategy.
  • To utilize the dual activation sites of a cobalt-silicon bond for enhanced catalytic performance.
  • To overcome catalyst poisoning in nitrene-group transfer reactions.

Main Methods:

  • Synthesis and characterization of a cobalt silylene complex.
  • Investigation of the Co=Si bond's role in cooperative substrate activation.
Keywords:
CobaltDual-Site CatalysisMetal-Ligand CooperationNitrene TransferSilylene

Related Experiment Videos

  • Evaluation of the catalyst's efficiency in nitrene-group transfer to carbon monoxide.

    • Main Results:

    • The cobalt silylene complex effectively activates substrates at both cobalt and silicon centers.
    • Orthogonal selectivity of Co and Si sites prevents catalyst poisoning.
    • Efficient nitrene-group transfer to carbon monoxide was achieved.

    Conclusions:

    • Cooperative group-transfer catalysis using cobalt-silicon bonds is a viable and powerful strategy.
    • Dual activation sites provide enhanced catalytic efficiency and stability.
    • This approach offers a promising route for challenging chemical transformations.