Selective Hydrogenation of Alkynes Catalyzed by Trinuclear Rhodium Hydride Complexes of the Type [{(Rh[PP*]H)32-H)33-H)}(BF4)2]

Authors

  • Christina Kohrt,

    1. Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29 A, 18059 Rostock (Germany), Fax: (+49) 381-1281-51183
    Search for more papers by this author
  • Gerrit Wienhöfer,

    1. Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29 A, 18059 Rostock (Germany), Fax: (+49) 381-1281-51183
    Search for more papers by this author
  • Cornelia Pribbenow,

    1. Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29 A, 18059 Rostock (Germany), Fax: (+49) 381-1281-51183
    Search for more papers by this author
  • Prof. Dr. Matthias Beller,

    1. Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29 A, 18059 Rostock (Germany), Fax: (+49) 381-1281-51183
    Search for more papers by this author
  • Prof. Dr. Detlef Heller

    Corresponding author
    1. Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29 A, 18059 Rostock (Germany), Fax: (+49) 381-1281-51183
    • Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29 A, 18059 Rostock (Germany), Fax: (+49) 381-1281-51183
    Search for more papers by this author

Abstract

original image

A clean win: A novel trinuclear rhodium(III)-hydride species allows for highly selective hydrogenation of diarylacetylenes under mild conditions (1 bar of hydrogen pressure at 30.0 °C in methanol) with low catalyst loadings (substrate/catalyst molar ratio≤10 000). In contrast to the mononuclear complex of the type [{Rh(PP*)(MeOH)2}BF4], no overhydrogenation of the diphenylacetylene to the alkane is observed. The hydrogen consumption follows Michaelis–Menten kinetics.

Ancillary