Switching on the Metathesis Activity of Re Oxo Alkylidene Surface Sites through a Tailor‐Made Silica–Alumina Support |
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| Authors: | Maxence Valla David Stadler Dr. Victor Mougel Prof. Dr. Christophe Copéret |
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| Affiliation: | Department of Chemistry and Applied Biosciences, Zürich, Switzerland |
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| Abstract: | Re oxo alkylidene surface species are putative active sites in classical heterogeneous Re‐based alkene‐metathesis catalysts. However, the lack of evidence for such species questions their existence and/or relevance as reaction intermediates. Using Re(O)(=CH‐CH=CPh2)(OtBuF6)3(THF), the corresponding well‐defined Re oxo alkylidene surface species can be generated on both silica and silica–alumina supports. While inactive on the silica support, it displays very good activity, even for functionalized olefins, on the silica–alumina support. |
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| Keywords: | alumina metathesis oxo alkylidene rhenium supported catalysts |
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