Understanding the reactivity of [W{double bond, long}NAr(CH2tBu)2({double bond, long}CHtBu)] (Ar = 2,6-iPrC6H3) with silica partially dehydroxylated at low temperatures through a combined use of molecular and surface organometallic chemistry

Bouchra Rhers, Elsje Alessandra Quadrelli, Anne Baudouin, Mostafa Taoufik, Christophe Copéret, Frédéric Lefebvre*, Jean-Marie Maurice Basset, Bernard Fenet, Amritanshu Sinha, Richard R. Schrock

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

Reaction of [W{double bond, long}NAr(CH2tBu)2({double bond, long}CHtBu)] (Ar = 2,6-iPrC6H3) with silica partially dehydoxylated at 200 °C does not lead only to the expected bisgrafted [({triple bond, long}SiO)2W{double bond, long}NAr({double bond, long}CHtBu)] species, but also surface reaction intermediates such as [({triple bond, long}SiO)2W{double bond, long}NAr(CH2tBu)2]. All these species were characterized by infrared spectroscopy, 1D and 2D solid state NMR, elemental analysis and molecular models obtained by using silsesquioxanes. While a mixture of several surface species, the resulting material displays high activity in the olefin metathesis.

Original languageEnglish (US)
Pages (from-to)5448-5455
Number of pages8
JournalJournal of Organometallic Chemistry
Volume691
Issue number24-25
DOIs
StatePublished - Dec 1 2006

Keywords

  • IR
  • Olefin metathesis
  • Silica
  • Solid state NMR
  • Surface organometallic chemistry
  • Tungsten

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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