Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 2359 - 2364 (1987)
Update date:2022-08-16
Topics:
Notheisz, Ferenc
Zsigmond, Agnes G.
Bartok, Mihaly
Schmith, Gerard V.
The transformations of methyloxirane and cis- and trans-2,3-dimethyloxirane have been studied on Pt/C and Pd/C catalysts at 373 K in the hydrogen pressure range 2-70 kPa in a circulation reactor.The reactions of the dimethyloxirane isomers proceed by similar mechanisms, the rate-determining step in both cases presumably being cleavage of the C-O bond.The mechanism for methyloxirane differs from that for the dimethyloxiranes.One mechanism involves edgewise adsorption of the oxirane (probably via two non-bonding electron pairs), while the other involves flat-lying adsorption.The change in regioselectivity with increase in hydrogen pressures caused by supression of the adsorption of oxygen via two electron pairs.
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