Which Cl atom is most susceptible to be attac | vedclass

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(D) The reactivity of a $C-Cl$ bond towards nucleophilic substitution depends on the nature of the carbon atom to which the chlorine is attached.$Cl^1

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$Cl^4$

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(D) The reactivity of a $C-Cl$ bond towards nucleophilic substitution depends on the nature of the carbon atom to which the chlorine is attached.$Cl^1$ is attached to an aromatic ring (aryl halide),where the $C-Cl$ bond has partial double bond character due to resonance,making it least reactive.$Cl^3$ is attached to a $sp^2$ hybridized carbon atom (vinylic halide),which is also very stable and less reactive towards nucleophilic substitution.$Cl^2$ is attached to a secondary alkyl carbon,which can undergo nucleophilic substitution.$Cl^4$ is attached to a tertiary alkyl carbon. Tertiary alkyl halides are the most reactive towards $S_N1$ reactions due to the formation of a stable tertiary carbocation intermediate. Therefore,$Cl^4$ is the most susceptible to nucleophilic attack by aqueous $KOH$.

Which $Cl$ atom is most susceptible to be attacked by aqueous $KOH$?

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