Why preparation of aryl iodide by electrophillic substitution requires presence of an oxidising agent? why can arylflouride not be prepared by this method?
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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.
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beacuse they are reversible in nature while electophiles substances are loving agents
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