Effect of support on metathesis of n-decane: drastic improvement in alkane metathesis with WMe5 linked to silica–alumina
M.K. Samantaray, R. Dey, E. Abou-Hamad, A. Hamieh, J.-M. Basset
- A European Journal, volume 21, issue 16, 6100-6106, (2015)
Alkanes, Metathesis, Solid-state NMR spectroscopy, Supported catalysts, Tungsten
[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.
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