Which of the given species cannot be used in Friedel Craft's reactions ?

Options

A. `FeCl_3`
B. `FeBr_2`
C. `AlCl_3`
D. `NaCl`

Answer

D

Explanation

All cations are expected to act as Lewis acid since they are electron deficient in nature. However, cation such as `Na^(+), K^(+)` etc (inert gas configuration) have a very little tendency to accept electrons. Therefore, they do not act as Lewis acids in Friedel-Craft's reaction.