In which of the following compounds does elec | vedclass

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(A) Electrophilic aromatic substitution occurs at the ortho and para positions when the substituent attached to the benzene ring is an ortho/para-dire

Vedclass · Accepted Answer

Chlorobenzene

Vedclass · Answer

(A) Electrophilic aromatic substitution occurs at the ortho and para positions when the substituent attached to the benzene ring is an ortho/para-directing group. These groups are typically electron-donating by resonance (e.g.,$-Cl$,$-OH$,$-NH_2$,$-CH_3$). In $Chlorobenzene$ $(C_6H_5Cl)$,the chlorine atom has lone pairs of electrons that can be donated to the ring through resonance,increasing the electron density at the ortho and para positions. Conversely,$-NO_2$ (in nitrobenzene) and $-COCH_3$ (in acetophenone) are electron-withdrawing groups that deactivate the ring and are meta-directing. Nitrocyclohexane is not an aromatic compound. Therefore,chlorobenzene is the correct answer.

In which of the following compounds does electrophilic attack occur at ortho and para positions?

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