Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is . [figure]
Answer
2
Solution
[figure]
–M group (C=O or C≡N pulls ring π electrons) ⇒ deactivating
+M group (lone pair of N or O given to the ring) ⇒ activating
Deactivating: -COOCH3 and -C N
∴ number of deactivating groups = 2
Answer: 2