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Assertion p-fluoro nitrobenzene is more...

Assertion p-fluoro nitrobenzene is more reactive than
p-bromo nitrobenzene in the aromatic necleophilic
substitution reaction with acqueous `NaOH`
Reason Addition of nuceophilie on the a-carbon of aryl
halide is the rate determing step is `S_(N)Ar` reaction.

A

Both assertion and reason are correct and reason is the
correct explanation of assertion

B

Both assertion and reason are correct and reason is not the
correct explanation of assertion

C

Assertion is correct but reason is incorrect.

D

Assertion is incorrect but reason is correct.

Text Solution

Verified by Experts

The correct Answer is:
A
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Bacause of the resonance stabilization of Arylhalides they are unreactive toward normal nuclephilic substitution reactions . However arylhalides having strong electron withdrawing groups at ortho and para positions give aromatic nucleophilic substitution reactions (S_(N)Ar mechanism ) , which involves a resonance stablilized carbanion called Meisenheimer complex Which arylhalide is most reactive toward S_(N)Ar mechanism ?

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