Abstract
A low surface area planar sample of bulk β-Mo 2C can be activated for olefin-metathesis reactions through the dissociative chemisorption of cyclopentanone to yield surface alkylidene-oxo species. This methodology allows the formation of a sufficiently high coverage of active sites to permit investigation of heterogeneous metathesis by surface science techniques. Reflectance absorbance infrared spectroscopy measurements were used to isolate η 1 and η 2-adsorbed cyclopentanone. The η 2-state was found to be the direct precursor for alkylidene-oxo formation. Olefin-metathesis reactions were carried out using propene and cyclopentene. The surface chemistry of cyclopentanone and cyclopentylidene on β-Mo 2C is compared to analogous organometallic systems.
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