Cobalt Catalysts for Alkene Hydrosilylation under Aerobic Conditions without Dry Solvents or Additives

Alkene hydrosilylation is typically performed with Pt catalysts, but inexpensive base‐metal catalysts would be preferred. Here, we report a simple method for the use of air‐stable cobalt catalysts for anti‐Markovnikov alkene hydrosilylation that can be used under aerobic conditions without dry solve...

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Bibliographic Details
Published in:European journal of inorganic chemistry 2018-12, Vol.2018 (45), p.4867-4874
Main Authors: Gutiérrez‐Tarriño, Silvia, Concepción, Patricia, Oña‐Burgos, Pascual
Format: Article
Language:English
Subjects:
Additives
Alkenes
Catalysis
Catalysts
Cobalt
Homogeneous catalysis
Hydrosilylation
Inorganic chemistry
Raman spectroscopy
Reaction mechanisms
Solvents
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Summary:Alkene hydrosilylation is typically performed with Pt catalysts, but inexpensive base‐metal catalysts would be preferred. Here, we report a simple method for the use of air‐stable cobalt catalysts for anti‐Markovnikov alkene hydrosilylation that can be used under aerobic conditions without dry solvents or additives. These catalysts can be generated from low‐cost commercially available materials. In addition, these catalysts possess good catalytic ability for both hydrosilanes and hydroalkoxysilanes. Finally, a mechanistic study demonstrates that the silane and the catalyst generate a Co–H species in the course of the reaction, which has been observed by in situ Raman spectroscopy. Alkene hydrosilylation catalyzed by cobalt(II) complexes under aerobic conditions without dry solvent or external activators is reported. In addition, a mechanistic study based on kinetics experiments and in situ Raman spectroscopy was carried out, where a Co–H species has been identified.
ISSN:1434-1948
1099-0682
DOI:10.1002/ejic.201801068