For preparing monoalkyl benzene,the acylation | vedclass

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Question

(C) Direct Friedel-Crafts alkylation of benzene often leads to polyalkylation because the alkyl group introduced is electron-donating,which activates

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In alkylation,a polyalkylated product is formed

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(C) Direct Friedel-Crafts alkylation of benzene often leads to polyalkylation because the alkyl group introduced is electron-donating,which activates the benzene ring towards further electrophilic substitution. To avoid this and obtain the monoalkylated product,Friedel-Crafts acylation is preferred. In acylation,an acyl group $(RCO-)$ is introduced,which is electron-withdrawing and deactivates the ring,preventing further substitution. The resulting ketone can then be reduced to the corresponding alkyl group using Clemmensen reduction or Wolff-Kishner reduction.

For preparing monoalkyl benzene,the acylation process is preferred over direct alkylation because:

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