4 3 Halogen
Exchange
Rationalised 2023-24
166
Chemistry
AgF, Hg2F2, CoF2 or SbF3 The reaction is termed as Swarts reaction (i) From hydrocarbons by electrophilic substitution
Aryl chlorides and bromides can be easily prepared by electrophilic
substitution of arenes with chlorine and bromine respectively in the
presence of Lewis acid catalysts like iron or iron(III) chloride