The reaction of p-bromobenzyl chloride with N | vedclass

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Question

(D) The reaction involves a nucleophilic substitution $(S_N2)$ reaction. $p-$bromobenzyl chloride contains a primary alkyl halide group $(-CH_2Cl)$ at

Vedclass · Accepted Answer

$4-$bromobenzyl cyanide

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(D) The reaction involves a nucleophilic substitution $(S_N2)$ reaction. $p-$bromobenzyl chloride contains a primary alkyl halide group $(-CH_2Cl)$ attached to the benzene ring. The $CN^-$ ion acts as a nucleophile and attacks the electrophilic carbon of the $-CH_2Cl$ group,displacing the chloride ion $(Cl^-)$. The bromine atom attached to the benzene ring is much less reactive towards nucleophilic substitution under these conditions compared to the benzylic chloride. Therefore,the product formed is $4-$bromobenzyl cyanide $(Br-C_6H_4-CH_2CN)$.

The reaction of $p-$bromobenzyl chloride with $NaCN$ in ethanol gives:

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