Organoactinides - Novel catalysts for demanding chemical transformations

Aswini K. Dash, Ylia Gurevizt, Ji Quan Wang, Jiaxi Wang, Moshe Kapon, Moris S. Eisen*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations

Abstract

The catalytic effect obtained by opening the coordination sphere of the organoactinide complex is presented. Replacing the pentamethylcyclopentadienyl ligand in Cp*2ThCl2 (Cp* = C5Me5) by the bridge ligation [Me2SiCp2″]2- 2[Li]+ (Cp″ = C5Me4) affords the synthesis of ansa-Me2SiCp2″ThCl2, which reacts with two equiv of BuLi affording the corresponding dibutyl complex ansa-Me2SiCp2″Th″Bu2. This latter complex was found to be an active catalyst for the dimerization of terminal alkynes, and in the hydrosilylation of terminal alkynes with PhSiH3. In both processes a large chemoselectivity and regioselectivity are achieved due to the hindered equatorial plane, attributed to the disposition of the methyl groups in the bridge ligation, forcing the incoming substrates to react with a specific regiochemistry.

Original languageEnglish
Pages (from-to)65-69
Number of pages5
JournalJournal of Alloys and Compounds
Volume344
Issue number1-2
DOIs
StatePublished - 7 Oct 2002
Externally publishedYes
EventRare Earths 2001 - Sao Paulo, Brazil
Duration: 7 Oct 20027 Oct 2002

Keywords

  • Alkynes
  • Catalysis
  • Dimerization
  • Hydrosilylation
  • Organoactinides
  • Organometall ic complexes

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