The Mechanism of the Oxidation of Propene to Acrolein over Copper Oxide

摘要: Abstract The oxidation of stereo-labeled propene to acrolein over copper oxide was studied obtain information about the nature intermediates involved in second hydrogen abstraction and oxygen incorporation process. Experiments with ( E )CHDCHCH 3 Z gave deuterated product ratios which were independent stereochemistry starting material. amounts -acrolein-3- d 1 , )-acrolein-3- acrolein-1- ratio 1:1:1.6 are consistent irreversible conversion a π-allyl σ-allyl intermediate. They exclude geometric discrimination effect H step. reaction )-CHDCDCH also formation species isotope 0.37 ± 0.06 for abstraction. results from oxidative dehydrogenation D- 18 O-labeled allyl alcohol show no end-to-end deuterium scrambling partial loss O acrolein. This suggests that bonded surface through does not equilibriate between end carbon atoms before desorbing differences behavior molybdate catalysts discussed.