Pairwise hydrogen addition in the selective semihydrogenation of alkynes on silica-supported Cu catalysts
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Pairwise hydrogen addition in the selective semihydrogenation of alkynes on silica-supported Cu catalysts.
Mechanistic insight into the semihydrogenation of 1-butyne and 2-butyne on Cu nanoparticles supported on partially dehydroxylated silica (Cu/SiO2-700) was obtained using parahydrogen. Hydrogenation of 1-butyne over Cu/SiO2-700 yielded 1-butene with ≥97% selectivity. The surface modification of this catalyst with tricyclohexylphosphine (PCy3) increased the selectivity to 1-butene up to nearly 10...
متن کاملPairwise hydrogen addition in the selective semihydrogenation of alkynes on silica-supported Cu catalysts† †Electronic supplementary information (ESI) available: Additional NMR spectra and data on conversion, NMR signal enhancements and percentages of pairwise hydrogen addition. See DOI: 10.1039/c6sc05276b Click here for additional data file.
Table S2. The results obtained in 1-butyne hydrogenation with parahydrogen over Cy3P-Cu/SiO2-700 catalyst: 1-butyne conversion (X), selectivity to 1-butene (S1-butene), signal enhancements (SE) calculated for vinyl CH and CH2 protons of 1-butene, and lower estimates of percentages of pairwise hydrogen addition calculated using SE values. Temperature, °C Flow rate, mL/s X, % S1-butene, % SE (CH)...
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ژورنال
عنوان ژورنال: Chemical Science
سال: 2017
ISSN: 2041-6520,2041-6539
DOI: 10.1039/c6sc05276b