The method of benzene to make iodobenzene
If you want to start with benzene to make iodobenzene, there must be a method. First, make benzene and nitrosulfuric acid co-located, control its temperature, and make benzene and nitrobenzene. Among them, the mixed acid of nitrosulfuric acid is to promote the transformation of benzene.

Nitrobenzene has been obtained, and then it reacts with iron and hydrochloric acid. After this change, nitrobenzene is converted into aniline. Aniline is the key material for the next reaction.

and aniline are obtained, which is mixed with sodium nitrite and hydrochloric acid and controlled at low temperature, and then becomes a diazonium salt. This diazonium salt is active in nature and easy to convert.

At the end, take the resulting diazonium salt and make it co-react with potassium iodide, and the diazonium group is replaced by iodine to obtain iodobenzene.

This method, after several steps of change, uses benzene as the source to obtain iodobenzene. In the intervening steps, temperature control and material selection are all necessary, so that the reaction can proceed smoothly and the production of iodobenzene can be obtained.