[WMe6] (1) supported on the surface of SiO2-Al2O3(500) (2) has been extensively characterized by solid-state NMR spectroscopy, elemental analysis, and gas quantification, which clearly reveal the formation of a mixture of monopodal and bipodal species with the migration of methyl from W to Al. The supported species SiO2-Al2O3(500) (2) transformed at 120°C into two types of carbynic centers, one of which is cationic and the other neutral. These species are very efficient for the metathesis of n-decane. Comparison with already-synthesized neutral bipodal tungsten indicates that the high increase in activity is due to the cationic character of the grafted tungsten.
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors acknowledge the KAUST Nuclear Magnetic Resonance Core Lab and technical assistance from Dr. Kazuo Yamauchi. The authors also thank Professor Lyndon Emsley, Dr. Emmanuel Callens, and Dr. Nassima Riache for fruitful discussions. This work was supported by funds from King Abdullah University of Science and Technology.
ASJC Scopus subject areas
- General Chemistry