Isomerization of 3,3-dimethyl-1-butene, 3-methyl-1-cyclopentene, and methylenecyclopentane over. gamma. -alumina
- Univ. Edinb.
The isomerization of 3,3-dimethyl-1-butene, 3-methyl-1-cyclopentene, and methylenecyclopentane over ..gamma..-alumina increased with increasing catalyst calcination temperature and with addition of fluoride to the catalyst. Catalyst treatment with hydrogen sulfide enhanced the activity for the 3,3-dimethylbutene and methylenecyclopentene isomerization and inhibited the 3-methylcyclopentene isomerization. The results were consistent with mechanisms according to which the skeletal isomerization of 3,3-dimethylbutene and the double-bond migration of methylenecyclopentane proceeded via a carbonium ion intermediate on Broensted acid sites, and the double-bond migration of 3-methylcyclopentene via a m-allylic intermediate on Lewis acid sites.
- OSTI ID:
- 6199818
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 61:2; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ADDITIVES
ALKANES
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BUTENES
CALCINATION
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL BONDS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CYCLOALKANES
CYCLOALKENES
DECOMPOSITION
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INHIBITION
INORGANIC ACIDS
ISOMERIZATION
KINETICS
LEWIS ACIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
REACTION INTERMEDIATES
REACTION KINETICS
SULFIDES
SULFUR COMPOUNDS
TEMPERATURE EFFECTS
THERMOCHEMICAL PROCESSES