The C-Cl bond lengths (in pm) in haloarene an | vedclass

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Question

(A) In haloarenes, the $C-Cl$ bond acquires partial double bond character due to resonance between the lone pair of electrons on the chlorine atom and

Vedclass · Accepted Answer

$169, 177$

Vedclass · Answer

(A) In haloarenes, the $C-Cl$ bond acquires partial double bond character due to resonance between the lone pair of electrons on the chlorine atom and the $\pi$-electron system of the benzene ring.This partial double bond character results in a shorter bond length compared to the pure single $C-Cl$ bond found in haloalkanes.The bond length of $C-Cl$ in chlorobenzene (haloarene) is approximately $169 \ pm$, while in chloromethane (haloalkane) it is approximately $177 \ pm$.Therefore, the correct order is $169 \ pm$ and $177 \ pm$.

The $C-Cl$ bond lengths (in $pm$) in haloarene and haloalkane are respectively:

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