Discuss the role of Lewis acids in the preparation of aryl bromides and chlorides in the dark.

Explanation

Lewis acids are electron deficient species. They are responsible for, inducing heterolytic fission in halogen molecule.
Role of Lewis acid is to produce an electrophile, The eletrophile produce will attack on electron rich benzene ring to produce aryl bromides and chlorides
Role of Lewis acid is to produce an electrophile. The electrophile produce will attack on electron rich benzen ring to produce aryl bromides and chlorides.
`AlCl_(3)+Cl_(2)to[AlCl_(4)]^(-)+Cl^(+)`
`AlBr_(3)+Br^(2)to[AlBr^(4)]^(-)+Br^(+)`
This electrophile will further attack on benzene.