Question

Which of the following groups is $o,p-$ directing but deactivates benzene ring for electrophilic substitution?

• A. $-C{H}_3$
• B. $-N{H}_2$
• C. $-Cl$
• D. $-N{O}_2$

Answer 1

Answer: (C)

$-Cl$

Halogens are electron-withdrawing groups due to electronegative nature, hence they deactivate benzene ring for electrophilic substitution but are o,p-directing due to resonance. (As halogens have lone pair).

Option C is correct.