Journal of the American Chemical Society · 2013 · 90 citations · 10 references
Natural SciencesChemistryMaterials ScienceCatalysisSolid-state ChemistrySurface ChemistryCatalyst CharacterizationCatalyst DesignCatalyst SynthesisCatalytic MaterialsHeterogeneous CatalysisSupported CatalystsAlkyne MetathesisCatalyst ActivationCatalyst Structure - Activity RelationshipsMetal Oxide CatalystsMetathesis CatalysisOlefin MetathesisOlefin Metathesis CatalysisTransition-metal-catalyzed Functionalization
Grafting (ArO)2W(═O)(═CHtBu) (ArO = 2,6-mesitylphenoxide) on partially dehydroxylated silica forms mostly [(≡SiO)W(═O)(═CHtBu)(OAr)] along with minor amounts of [(≡SiO)W(═O)(CH2tBu)(OAr)2] (20%), both fully characterized by elemental analysis and IR and NMR spectroscopies. The well-defined oxo alkylidene surface complex [(≡SiO)W(═O)(═CHtBu)OAr] is among the most active heterogeneous metathesis catalysts reported to date in the self-metathesis of cis-4-nonene and ethyl oleate, in sharp contrast to the classical heterogeneous catalysts based on WO3/SiO2.
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A Well-Defined, Silica-Supported Tungsten Imido Alkylidene Olefin Metathesis Catalyst
Bouchra Rhers, Alain Salameh, Anne Baudouin et al. · Organometallics · 2006 · 153 citations · Full text