Bis(η5-Pentamethylcyclopentadienyl) Complexes of Titanium, Zirconium, and Hafnium

Endy Y.J. Min, John E. Bercaw, Wesley Bernskoetter, Paul J. Chirik

Research output: Chapter in Book/Report/Conference proceedingChapter


The chemistry of organometallic derivatives of titanium and zirconium bearing two pentamethylcyclopentadienyl groups as ancillary ligands has proven to be rich and varied, whereas that for hafnium is still in its formative stages. Derivatives of permethyltitanocene, permethylzirconocene, and permethylhafnocene offer a number of advantages over their (η5-C5H5) analogs. Generally, they exhibit higher thermal stability, solubility, and crystallinity. Furthermore, the steric bulk of the pentamethylcyclopentadienyl group discourages oligomerization through singleatom bridges (H, O, N), thus rendering permethylmetallocene derivatives monomeric. Such properties have facilitated the development of a rich and diverse reaction chemistry for compounds of the group 4 transition metals with pentamethylcyclopentadienyl ancillary ligands.

Original languageEnglish (US)
Title of host publicationInorganic Syntheses
Number of pages5
ISBN (Electronic)9781118744994
ISBN (Print)9781118744871
StatePublished - May 12 2014

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Engineering
  • General Materials Science


  • Bis(η5-pentamethylcyclopentadienyl) dichlorohafnium(IV)
  • Bis(η5-pentamethylcyclopentadienyl) dichlorotitanium(IV)
  • Bis(η5-pentamethylcyclopentadienyl) dichlorozirconium(IV)


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