Question

Which of the following can't be used in Friedel-Crafts reaction?

• A. $FeC{l}_3$
• B. $FeB{r}_2$
• C. $AlC{l}_3$
• D. $NaCl$

Answer 1

Answer: (D)

$FeC{l}_3,FeB{r}_2$ and $AlC{l}_3$ are used in Friedel-Crafts reaction because they act as Lewis acid since they are electron deficient in nature. However cations such as $N{a}^{+},K^{+}$ have a very little tendency, to accept electrons due to inert gas configuration. Therefore, cant be used in Friedel-Craft reaction.