Question

Arul chlorides and bromide can be easily prepared by electrophilic substitution of arenes with chlorine and bromine respectively in the presence of lewis acid catalyst but why does preparation of aryl iodides requires presence of an oxidizing agent

Answer 1

In the case of electrophillic substitution reaction of aryl iodide, HI is produced which is a reducing agent.

It reduces aryl iodide back to aromatic hydrocarbon and iodine.

This reaction is reversible.

Hence oxidising agents such as HgO, HNO3 are used to remove HI produced in the reaction as follows:

4HI + 2HNO3 → 2N2O3 + 2I2

please please mark me as brainliest as no other answered it as I

Answer 2

YES..........IT IS CORRECT