Question

Aryl chlorides and bromides can be easily prepared by electrophilic substitution reaction

Answer 1

yes aryl chlorides and bromides can be easily prepared by electrophilic substitution reaction. It can be easily prepared from benzene diazonium chloride by sandmeyer reaction or gattermann reaction.






In sandmeyer reaction CuCl and HCl are used as the catalyst in reaction with benzene diazonium chloride to form chlorobenzene. If you add CuCl and HCl with benzene diazonium chloride it will give you chlorobenzene. In the same process if you add CuBr and HBr with benzene diazonium chloride it will give you bromobenze.







In gattermann reaction if you add Cu and HCl to benzene diazonium chloride it will give you chlorobenzene. In the same process if you add Cu and HBr to benzene diazonium chloride it will give you bromobenzene.







Iodobenzene is also can be prepared from benzene diazonium chloride. If you add KI to benzene diazonium chloride and heat it slightly it will give you iodobenzene.

Answer 2

Answer:

Explanation:

Aryl chlorides and bromides can easily be prepared by electrophilic substitution of arenes. Reactions of arenes with iodine are reversible in nature. So, aryl iodides are prepared in the presence of an oxidising agent such as HN{{O}_{3}}, HIO4, etc., in order to oxidise the HI formed during iodination.