Question

Which of the following cannot be a catalyst in the electrophilic substitution of arenes?

• A. $FeC{l}_3$
• B. $AlC{l}_3$
• C. $N{H}_3$
• D. $FeB{r}_3$

Answer 1

The correct option is C $N{H}_3$

The electrophilic substitution of arenes requires the presence of a Lewis acid catalyst which acts as a halogen carrier. $N{H}_3$ is a Lewis base.