A Well-Defined Silica-Supported Tungsten Oxo Alkylidene Is a Highly Active Alkene Metathesis Catalyst

A Well-Defined Silica-Supported Tungsten Oxo Alkylidene Is a Highly Active Alkene Metathesis Catalyst

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 alkyl...

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Veröffentlicht in:Journal of the American Chemical Society 2013-12, Vol.135 (51), p.19068-19070
Hauptverfasser: Conley, Matthew P, Mougel, Victor, Peryshkov, Dmitry V, Forrest, William P, Gajan, David, Lesage, Anne, Emsley, Lyndon, Copéret, Christophe, Schrock, Richard R
Format: Artikel
Sprache:eng
Schlagworte:
Analytical chemistry
Chemical Sciences
or physical chemistry
Theoretical and
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Zusammenfassung: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.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja410052u