What happens when benzene reacts with n-propylchloride in presence of anhydrous aluminium chloride?

Explanation

The major product of the reaction is isopropyl benzene called as cumene.

The initially formed `CH_(3)CH_(2)overset(+)CH_(2)` gets rearranged to more stable secondary carbocation `CH_(3)overset(+)CHCH_(3)`.
Hence the major product is isopropyl benzene and minor product is propyl benzene.
`CH_(3)CH_(2)CH_(2)Cl+AlCl_(3) hArr CH_(3)overset(+)CH_(2)+AlCl_(4)^(-)`
`CH_(3)CH_(2)overset(+)CH_(2) overset(H^(-)"shift")to CH_(3)overset(+)CHCH_(3)`