Well-Defined Molybdenum Oxo Alkyl Complex Supported on Silica by Surface Organometallic Chemistry: A Highly Active Olefin Metathesis Precatalyst
Le Quéméner, Frédéric
Szeto, Kai C.
De Mallmann, Aimery
Gauvin, Régis M.
KAUST Grant Number2174 CGR3
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AbstractThe well-defined silica-supported molybdenum oxo alkyl species (SiO−)MoO(CH Bu) was selectively prepared by grafting of MoO(CH Bu)Cl onto partially dehydroxylated silica (silica) using the surface organometallic chemistry approach. This surface species was fully characterized by elemental analysis and DRIFT, solid-state NMR, and EXAFS spectroscopy. This new material is related to the active species of industrial supported MoO/SiO olefin metathesis catalysts. It displays very high activity in propene self-metathesis at mild (turnover number = 90 000 after 25 h). Remarkably, its catalytic performance outpaces those of the parent imido derivative and its tungsten oxo analogue.
CitationMerle N, Le Quéméner F, Bouhoute Y, Szeto KC, De Mallmann A, et al. (2017) Well-Defined Molybdenum Oxo Alkyl Complex Supported on Silica by Surface Organometallic Chemistry: A Highly Active Olefin Metathesis Precatalyst. Journal of the American Chemical Society 139: 2144–2147. Available: http://dx.doi.org/10.1021/jacs.6b11220.
SponsorsWe thank the Competitive Research Grant Program, supported by the KAUST Research Fund (Project 2174 CGR3), and the Agence Nationale de la Recherche (ANR-12-BS07-0021-01, OXOCAT) for their financial support and Olivier Mathon for his help during the recording of the XAS spectra on beamline BM23 at ESRF (experiment code IN-986).
PublisherAmerican Chemical Society (ACS)