Catalytic Hydrogenation by Pentacyanocobaltate(II): π- and σ- Allylic Complex Intermediates

  • Jack Kwiatek
  • Jay K. Seyler
Conference paper


The catalytid hydrogenation of a variety of organic substrates may be effected by pentacyanocobaltate(II) anion in aqueous solution (1). A general requirement for the reduction of the carbon-carbon double bond is the presence of conjugation; thus, conjugated dienes are reduced to the monoolefin stage. A further requirement fappears to be the ability or the diene to attain a “cisoid” conformation (2). For example, 2, 5-dimethyl-2, 4-hexadiene, in which the cisoid conformation is sterically hindered, is not reduced, while bicyclo - [2,2,1]heptadiene, in which a cisoid conformation is fixed, is reduced, although its resonance stabilization in the ground state is considered to be negligible (3).


Phenacyl Bromide Isomer Distribution Butene Isomer Allyl Iodide Cobalt Carbonyl 
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Copyright information

© Springer-Verlag Wien 1964

Authors and Affiliations

  • Jack Kwiatek
    • 1
  • Jay K. Seyler
    • 1
  1. 1.Division of National Distillers and Chemical Corp.U.S. Industrial Chemicals Co.CincinnatiUSA

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