Question

Which catalyst is used during halogenation of benzene?

Answer 1

Answer:

Benzene reacts with chlorine or bromine in an electrophilic substitution reaction, but only in the presence of a catalyst. The catalyst is either aluminum chloride (or aluminum bromide if you are reacting benzene with bromine) or iron.

Answer 2

Aluminum chloride or aluminum bromide are utilized as catalysts in the halogenation of benzene.

Explanation:

• In an electrophilic substitution process, benzene interacts with chlorine or bromine, but only in the presence of a catalyst. Aluminum chloride (or aluminum bromide if you're reacting benzene with bromine) or iron serve as catalysts. Iron is technically not a catalyst because it undergoes permanent alteration throughout the reaction.

It becomes iron, chloride, or bromide when it reacts with some chlorine or bromine.

$2FE$ ± $3Cl2$ ≅ $2FeCl3$

$2FE$ ± $3Br2$ ≅ $2FeBr3$

In these reactions, these molecules act as catalysts and behave identically like aluminum chloride.