Select the correct option for the most meta directing group:
- a) NO2
- b) OCH3
- c) CHO
- d) CONH2
The correct option is a) NO2
Meta directors are also known as deactivators. In an electrophilic aromatic substitution, a substituent that helps in the electrophilic attack of the meta substituent is known as meta directors.
Examples of meta directing groups include nitro groups, alkyl groups, sulfones, and carbonyl compounds.