Ximo Ag

Matthew P Conley

Christophe Coperet

Georg Emil Frater

Jeno Varga

Victor Mougel

Method of making an immobilized tungsten catalyst comprising or consisting of (&#x2261;SiO)W(&#x2550;O)(&#x2550;CRR)(Ror R)(L), comprising at least the following step (i): (i) reacting silica (Si02) with a tungsten oxo alkylidene complex comprising or consisting of (R)(R)W(&#x2550;O)(&#x2550;CRR)(L), preferably wherein &#x2550;CRRis selected from &#x2550;CHC(CH)or &#x2550;CH(C(CH))CHand Rand Rare independently selected from pyrrol-1-yl, 2,5-dimethylpyrrol-1-yl, or 2,5-diphenylpyrrol-1-yl, or &#x2014;OR, wherein R is a six membered or 10 membered aryl ring, optionally substituted.

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Zurich, Switzerland

Matthew P Conley