Abstract
Grafting of [Mo(NAr)({double bond, long}CHCMe2R)(CH2tBu)2], 1-R (R = Me or Ph) on the surface silanols of SiO2-(700) gives 2-R through the electrophilic cleavage of the Mo-C σ-bond according to labelling (GC/MS and solid-state NMR) and reactivity studies (monitoring initiation). Similarly, molecular silanol derivatives react with 1-Ph also to give directly the monosiloxy derivatives. Therefore, surface or molecular silanols have reactivities similar to alcohols and phenols having pKa ≥ 9. Finally, the surface complex 2-R (R = Me or Ph) is a highly efficient olefin metathesis catalyst.
Original language | English (US) |
---|---|
Pages (from-to) | 137-146 |
Number of pages | 10 |
Journal | Comptes Rendus Chimie |
Volume | 11 |
Issue number | 1-2 |
DOIs | |
State | Published - Jan 2008 |
Externally published | Yes |
Keywords
- Heterogeneous catalysis
- Mo imido alkylidene
- Olefin metathesis
- Silica
- Surface organometallic chemistry
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering