The mechanism of hydrogenolysis and isomerization of oxacycloalkanes on metals. III. Effect of partial pressure of hydrogen on the selectivity of hydrogenolysis of oxacycloalkanes on Pt

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Abstract

The rates of hydrogenolysis and isomerization of methyloxirane, cis- and trans-2,3-dimethyloxirane and 2-methyloxetane were studied on a Pt C catalyst, as functions of the hydrogen pressure and the temperature. A new phenomenon was observed in the case of 2-methyloxetane: the change in mechanism as the temperature was elevated led to a change in regioselectivity. There is no such effect for methyloxirane, for which the dissociative mechanism is not competitive at high hydrogen pressure. Likewise, the mechanisms of transformation of methyloxirane and the 2,3-dimethyloxiranes are not the same. Methyloxirane probably participated in edgewise adsorption on the surface of the catalyst, while cis-2,3-dimethyloxirane undergoes flat adsorption.

Original languageEnglish
Pages (from-to)39-44
Number of pages6
JournalJournal of Catalysis
Volume100
Issue number1
DOIs
Publication statusPublished - 1986

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hydrogenolysis
Hydrogenolysis
Isomerization
Partial pressure
isomerization
partial pressure
Hydrogen
selectivity
Metals
Adsorption
Regioselectivity
Catalysts
hydrogen
metals
catalysts
adsorption
Temperature
temperature
propylene oxide

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

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title = "The mechanism of hydrogenolysis and isomerization of oxacycloalkanes on metals. III. Effect of partial pressure of hydrogen on the selectivity of hydrogenolysis of oxacycloalkanes on Pt",
abstract = "The rates of hydrogenolysis and isomerization of methyloxirane, cis- and trans-2,3-dimethyloxirane and 2-methyloxetane were studied on a Pt C catalyst, as functions of the hydrogen pressure and the temperature. A new phenomenon was observed in the case of 2-methyloxetane: the change in mechanism as the temperature was elevated led to a change in regioselectivity. There is no such effect for methyloxirane, for which the dissociative mechanism is not competitive at high hydrogen pressure. Likewise, the mechanisms of transformation of methyloxirane and the 2,3-dimethyloxiranes are not the same. Methyloxirane probably participated in edgewise adsorption on the surface of the catalyst, while cis-2,3-dimethyloxirane undergoes flat adsorption.",
author = "M. Bart{\'o}k and F. Notheisz and A. Zsigmond and Smith, {G. V.}",
year = "1986",
doi = "10.1016/0021-9517(86)90069-2",
language = "English",
volume = "100",
pages = "39--44",
journal = "Journal of Catalysis",
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T1 - The mechanism of hydrogenolysis and isomerization of oxacycloalkanes on metals. III. Effect of partial pressure of hydrogen on the selectivity of hydrogenolysis of oxacycloalkanes on Pt

AU - Bartók, M.

AU - Notheisz, F.

AU - Zsigmond, A.

AU - Smith, G. V.

PY - 1986

Y1 - 1986

N2 - The rates of hydrogenolysis and isomerization of methyloxirane, cis- and trans-2,3-dimethyloxirane and 2-methyloxetane were studied on a Pt C catalyst, as functions of the hydrogen pressure and the temperature. A new phenomenon was observed in the case of 2-methyloxetane: the change in mechanism as the temperature was elevated led to a change in regioselectivity. There is no such effect for methyloxirane, for which the dissociative mechanism is not competitive at high hydrogen pressure. Likewise, the mechanisms of transformation of methyloxirane and the 2,3-dimethyloxiranes are not the same. Methyloxirane probably participated in edgewise adsorption on the surface of the catalyst, while cis-2,3-dimethyloxirane undergoes flat adsorption.

AB - The rates of hydrogenolysis and isomerization of methyloxirane, cis- and trans-2,3-dimethyloxirane and 2-methyloxetane were studied on a Pt C catalyst, as functions of the hydrogen pressure and the temperature. A new phenomenon was observed in the case of 2-methyloxetane: the change in mechanism as the temperature was elevated led to a change in regioselectivity. There is no such effect for methyloxirane, for which the dissociative mechanism is not competitive at high hydrogen pressure. Likewise, the mechanisms of transformation of methyloxirane and the 2,3-dimethyloxiranes are not the same. Methyloxirane probably participated in edgewise adsorption on the surface of the catalyst, while cis-2,3-dimethyloxirane undergoes flat adsorption.

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U2 - 10.1016/0021-9517(86)90069-2

DO - 10.1016/0021-9517(86)90069-2

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JF - Journal of Catalysis

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