Properties Of Benzene

Friedel crafts acylation followed by

clemmensen reduction forms -propyl benzene as follows :

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Friedel craft alkylation method can also be used for conversion of benzene to n-propyl benzene. But the electrophile

formed in acylation method is more electrophilic in nature

than the electrophile formed in alkylation method.

Hence, acylation followed by clemmensen reduction is more preferrable.