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Some meta-directing substituents in arom...

Some meta-directing substituents in aromatic substitution are given which one is the most deactivating?

A

`-C-=N`

B

`-SO_3H`

C

`-COOH`

D

`-NO_2`

Text Solution

Verified by Experts

The correct Answer is:
D
The deactivating tendency of given a groups follows the order `-NO_2 gt -SO_3H gt -C -= N gt - oversetoverset(O)(||)C-OH`
Thus, `-NO_2` is the most deactivating group.
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