Question

role of catalyst in electrophilic substitution reaction in benzene

Answer 1

It changes the rate of chemical reaction without making itself consuming in the reaction

Answer 2

● Answer -
In electrophilic substitution of benzene, catalyst provides electrophilic species for initial substitution.

● Electrophilic substitution of benzene -
- Catalyst attacks the reagent and creates electrophile for further substitution.
- Electron deficient species are chosen as catalysts. Etc. AlBr3, F3Cl3, etc.
- In bromination of benzene, AlBr3 reacts with bromine to form bromonium ion.
AlBr3 + Br2 --> Br+ + AlBr4-



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