Summary
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1.
A study has been made of the hydrogen-exchange reaction occurring when heavy sulfuric acid reacts with saturated cyclic hydrocarbons(cyclohexane, methylcyclohexane, 1,1-dimethyleyclohexane, 1,4-dimethylcyelohexane, 1-ethyl-4-merhylcyclohexane, eyclopentane, methylcyclopentane, and cis- and trans -decahydronaphthalenes).
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2.
It has been established that monocyclic hydrocarbons containing tertiary carbon atoms (methylcyclohexane, 1,4-d:methyloyclohexane, 1-ethyl-4-methylcyclohexane, and methylcyclopentane) undergo hydrogen exchange, equilibrium being established in a few hours at room temperature.
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3.
It has been Found that no hydrogen exchange is to be observed between heavy sulfuric acid and cis- and trans-decahydronaphthalenes,
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4.
It has been established that, when a mixture of a hydrocarbon containing a tertiary carbon atom with a hydrocarbon that does not contain a tertiary carbon atom is treated with heavy sulfuric acid, only the hydrocarbon containing the tertiary carbon atom takes part in hydrogen exchange.
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Setkina, V.N., Kursanov, D.N. & Liberman, A.L. Exchange of hydrogen atoms of saturated cyclic hydrocarbons with sulfuric acid. Russ Chem Bull 3, 89–94 (1954). https://doi.org/10.1007/BF01195428
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DOI: https://doi.org/10.1007/BF01195428