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  4. The reaction of RCONH2 with a mixture of Br2 and aqueous KOH gives RNH2 as the main product. The intermediate not involved in this reaction is (are):

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Q. The reaction of $RCONH_{2}$ with a mixture of $Br_{2}$ and aqueous $KOH$ gives $RNH_{2}$ as the main product. The intermediate not involved in this reaction is (are):

NTA AbhyasNTA Abhyas 2020Amines

Solution:

This is Hofmann bromamide reaction and $RCONBr_{2}$ does not form in this reaction. See mechanism for it:

$RCO-NH_{2}+Br_{2}+4KOH \rightarrow R-NH_{2}+K_{2}CO_{3}+2KBr+2H_{2}O$

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