A Silica-Supported Monoalkylated Tungsten Dioxo Complex Catalyst for Olefin Metathesis

Niladri Maity, Samir Barman, Yury Minenkov, Samy Ould-Chikh, Edy Abou-Hamad, Tao Ma, Ziyauddin Qureshi, Luigi Cavallo, Valerio D’Elia, Bruce C. Gates, Jean-Marie Basset

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21 Scopus citations

Abstract

A well-defined silica-supported monoalkylated tungsten dioxo complex [(Si-O-)W(=O)(CH-Bu)] was prepared by treatment of highly dehydroxylated silica (SiO: silica treated at 700 °C under high vacuum) with an ionic precursor complex [NEt][W(=O)(CH-Bu)]. The identity of the resulting neutral monoalkylated tungsten dioxo surface complex was established by means of elemental microanalysis and spectroscopic studies (IR, solid-state NMR, Raman, and X-ray absorption spectroscopies). The supported tungsten complex was found to act as a precatalyst for the self-metathesis of 1-octene in a batch reactor. The mechanistic implications of this reaction are discussed with the support of DFT calculations highlighting the potential occurrence of thus-far unexplored mechanistic pathways.
Original languageEnglish (US)
Pages (from-to)2715-2729
Number of pages15
JournalACS Catalysis
Volume8
Issue number4
DOIs
StatePublished - Feb 15 2018

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