Öffnung von Dreikernclustern durch Diphosphinomethan-Liganden / Opening of Trinuclear Clusters by Diphosphinomethane Ligands

Academic Article


  • Abstract The phosphinidene bridged clusters FeCo2(CO)9(PMe) and FeCoWCp(CO)8(PM e) add the diphosphinomethane ligands dmpm and dppm with concomitant opening of two metal-metal bonds. The crystal structure determination of the addition product (Me2P-CH2-PMe2)FeCoWCp(CO)8(PMe) has shown that the Fe -W and Fe -Co bonds have been opened and the chelating diphosphine spans the Co -W bond. This is in contrast to the reaction with monodentate phosphines where the Co -W and Co -Fe bonds are broken. Upon heating the addition products eliminate two moles of CO with formation of the diphos­ phinom ethane substituted starting clusters, which in turn add CO under pressure to re-form the addition products.
  • Authors

  • Planalp, Roy
  • Vahrenkamp, Heinrich
  • Status

    Publication Date

  • February 1, 1989
  • Digital Object Identifier (doi)

    Start Page

  • 139
  • End Page

  • 144
  • Volume

  • 44
  • Issue

  • 2