Hydrogenation and dehydrogenation of 4-isopropenyl-1-methylcyclohexene catalyzed by MgO, CaO, La2O3, ThO2, and ZrO2.
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4-Isopropenyl-1-methylcyclohexene undergoes hydrogenation over ZrO<SUB>2</SUB> and ThO<SUB>2</SUB> to 4-isopropyl-1-methylcyclohexene, while it undergoes mainly dehydrogenation over MgO, CaO, and La<SUB>2</SUB>O<SUB>3</SUB> to 1-isopropyl-4-methylbenzene. The activity variation of catalysts with pretreatment temperature and the reaction of 4-isopropyl-1-methyl-1,3-cyclohexadiene suggest that selectivity is determined by relative activity for hydrogenation to that for double bond isomerization.
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- Hydrogenation and dehydrogenation of 4-isopropenyl-1-methylcyclohexene catalyzed by MgO, CaO, La2O3, ThO2, and ZrO2.