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- W2010242541 abstract "The SiO2- or Al2O3-attached Mo-monomer and -dimer catalysts with well-defined structures, prepared using the reaction between Mo(η3-C3H5)4 or Mo2(η3-C3H5)4 and the surface OH groups of silica or alumina and followed by chemical treatment, were found to be 10 -103 times more active than conventional Mo catalysts for propene metathesis over the temperature range 266 – 308 K. The activity order for various surface molybdenum structures containing Mo(IV), Mo(III), Mo(V), Mo(VI) and Mo(II) is given. Both the nature of the ligands and the oxidation state of molybdenum profoundly affect the metathesis activity. Metathesis on the attached catalysts is explained by a one-site chain mechanism involving a carbene intermediate. Tracer studies show that the initial carbene for ethene or propene metathesis over active attached Mo-monomer and -dimer catalysts is formed by a 1,2-hydrogen shift via a molybdenum-n-alkenyl intermediate." @default.
- W2010242541 created "2016-06-24" @default.
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- W2010242541 date "1985-01-01" @default.
- W2010242541 modified "2023-09-26" @default.
- W2010242541 title "Olefin metathesis over Al2o3 or SiO2-attached molybdenum catalysts: active structures and mechanism for initial carbene formation" @default.
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- W2010242541 doi "https://doi.org/10.1016/0304-5102(85)87028-0" @default.
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