Why HNO3 and HIO4 are used for electrophilic substitution of toluene to form ortho and para iodotoluene?
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In the electrophilic addition reaction HI is formed which is a reducing agent so it reduces the iodotoleune to toleune.
So to destroy the HI formed HNO3 and HIO4 are addes as they are oxidising agents
Explanation:
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