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Directive Influence of Substituents

Some meta - d...

Question

Some meta - directing substituent in aromatic substitution is given. Which one is most deactivating?

A

C N

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B

S O_{3}

H

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C

C O O H

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D

N O_{2}

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Solution

The correct option is D $N O_{2}$
Nitro ( $N O_{2}$ ) group is a meta directing group and they are electron withdrawing group and is a deactivating group because it withdraws electron density from the ring and makes it a poorer nucleophile.

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