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Question

(A) The reactivity of aromatic compounds towards Electrophilic Aromatic Substitution $(EAS)$ depends on the electron density of the benzene ring.$1$.

Vedclass · Accepted Answer

$a > c > d > b$

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(A) The reactivity of aromatic compounds towards Electrophilic Aromatic Substitution $(EAS)$ depends on the electron density of the benzene ring.$1$. $Toluene$ ($-CH_3$ group): The methyl group is electron-donating via $+I$ and hyperconjugation effects,which increases the electron density on the ring,making it more reactive than benzene.$2$. $Benzene$: This is the reference compound.$3$. $Chlorobenzene$ ($-Cl$ group): The chlorine atom is electron-withdrawing via the inductive effect $(-I)$,which decreases the electron density on the ring,although it is ortho/para directing due to resonance $(+M)$. It is less reactive than benzene.$4$. $Nitrobenzene$ ($-NO_2$ group): The nitro group is strongly electron-withdrawing via both $-I$ and $-M$ effects,significantly decreasing the electron density on the ring,making it the least reactive.Therefore,the decreasing order of reactivity is: $Toluene (a) > Benzene (c) > Chlorobenzene (d) > Nitrobenzene (b)$.

Rank the following compounds in decreasing order of reactivity towards Electrophilic Aromatic Substitution $(EAS)$ reaction:
$(a)$ $Toluene$
$(b)$ $Nitrobenzene$
$(c)$ $Benzene$
$(d)$ $Chlorobenzene$

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Rank the following compounds in decreasing order of reactivity towards Electrophilic Aromatic Substitution $(EAS)$ reaction:$(a)$ $Toluene$$(b)$ $Nitrobenzene$$(c)$ $Benzene$$(d)$ $Chlorobenzene$