Ethyl benzene is generally prepared by acetylation of benzene

CBSE Class 12 CBSE Class 12 Chemistry
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1

Ethyl benzene is generally prepared by acetylation of benzene followed by the reduction and not by
direct alkylation. Think of a possible reason.

2

Preparation of ethyl benzene from acylation of benzene yields acetophenone which on reduction gives ethyl benzene. The complete reactions can be shown as:

Preparation of ethyl benzene from acylation of benzene yields acetophenone which on reduction gives ethyl benzene. The complete reactions can be shown as.png703×104 10.2 KB

The direct alkylation cannot be performed because polysubstitution product is formed. Due to disadvantage of polysubstitution, the Friedel-Crafts alkylation reaction is not used for the preparation of alkyl benzene. Instead of that, Friedel-Crafts acylation is used.