For the electrophilic aromatic substitution r | vedclass

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Question

(A) Electrophilic aromatic substitution is facilitated by electron-donating groups and inhibited by electron-withdrawing groups.$-CH_3$ is an electron

Vedclass · Accepted Answer

$-CCl_3 < -CHCl_2 < -CH_2Cl < -CH_3$

Vedclass · Answer

(A) Electrophilic aromatic substitution is facilitated by electron-donating groups and inhibited by electron-withdrawing groups.$-CH_3$ is an electron-donating group due to the $+I$ effect and hyperconjugation,which activates the ring.Chlorine atoms are highly electronegative and exert a $-I$ effect. As the number of chlorine atoms increases,the electron-withdrawing effect increases,making the ring more deactivated.The order of electron-withdrawing strength is $-CH_2Cl Therefore,the reactivity towards electrophilic substitution decreases as the number of chlorine atoms increases.The correct increasing order of reactivity is $-CCl_3 < -CHCl_2 < -CH_2Cl < -CH_3$.

For the electrophilic aromatic substitution reaction on the benzene ring,the substituents are $-CH_3$,$-CH_2Cl$,$-CHCl_2$,and $-CCl_3$. What is the increasing order of reactivity towards electrophilic substitution?

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