Effect of Support on Metathesis of n‐Decane: Drastic Improvement in Alkane Metathesis with WMe5 Linked to Silica–Alumina |
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| Authors: | Dr Manoja K Samantaray Dr Raju Dey Dr Edy Abou‐Hamad Ali Hamieh Prof Jean‐Marie Basset |
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| Institution: | KAUST Catalysis Center, King Abdullah University of Science and Technology, Thuwal 23955‐6900 (Kingdom of Saudi Arabia) |
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| Abstract: | 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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| Keywords: | alkanes metathesis solid‐state NMR spectroscopy supported catalysts tungsten |
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