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Standard XII
Chemistry
General Mechanism of Electrophilic Aromatic Substitution
Why do we get...
Question
Why do we get isopropyl benzene on treating benzene with 1-chloropropane instead of n- propyl benzene ?
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Solution
When benzene reacts with 1-chloropropane in presence of
A
l
C
l
3
, the formation of primary carbocation takes place.
The primary carbocation is less stable than secondary carbocation.
So this primary carbocation undergoes rearrangement reaction to form a secondary carbocation.
Because of this rearrangement, we get isopropyl benzene instead of n-propylbenzene.
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Standard XII Chemistry
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