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Lanthanides & Actinides
Organoactinides
  • Organometallic chemistry of actinides is relatively recent
  • Similar to lanthanides in range of cyclopentadienides / cyclooctatetraenides / alkyls
  • Cyclopentadienides are p-bonded to actinides.

    Compounds include:-

  • C5H5- does not behave ionically
  • but Cl- is labile: Þ formation of a wide variety of (C5H5)3UX compounds
  • The most notable Cyclooctatetraenide is Uranocene

  • Green crystals
  • Paramagnetic
  • Pyrophoric
  • Stable to hydrolysis
  • Planar 'sandwich'
  • Eclipsed D8h conformation
  • UV-PES studies show that bonding in uranocene has 5f & 6d contributions
    • e2u symmetry interaction shown can only occur via f-orbitals
    • See: C. Elschenbroich & A. Salzer, Organometallics, 2nd ed.VCH, Weinheim, 1992 p. 363-5

--Info & DownloadsBibliography  [textbook & online resources]

Source: Dr. S.J. Heyes; University of Oxford
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