Reactivity of Tungsten-aryloxides with Hydrosilane Cocatalysts in Olefin Metathesis

Reactivity of Tungsten-aryloxides with Hydrosilane Cocatalysts in Olefin Metathesis

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The reactivity of the [WCl4(OAr)2] (OAr = O-2,6-C3H3Cl2, O-2,6-C6H3F2 and O-C6H3Me2) systems, plus the silicon compounds Ph2SiH2 and polymethylhydrosiloxane (PMHS), were studied in metathesis reactions.The olefins used were methyl-10-undecenoate and 1-hexene.The results showed that the [WCl4(OAr)2]-silicon compound systems are active Boardshorts and selective when the aryloxide ligand contain electronegative groups.The silicon compound PMHS proved to be the best cocatalyst for metathesis, Sun Hat even with the [WCl4(O-2,6-C6H3Me 2)2] compound, which has no electronegative substituents.

Because it is non-toxic, non-volatile, easy to handle and cheap, PMHS is a good alternative cocatalyst in metathesis reactions.