Hoffmann Rearrangement Principle : When amide is react with hypohalide it gives primery amine having one carbon atom less than the original amide. In this reaction actual product is isocynate (R-CNO). R-CONH2 + Br2 + 4KOH ￫ R-NH2 + 2KBr + 2H2O + K2CO3 Mechanism : ● Step - 1 : Formation of N-bromoamide : In the first step amide is react with bromine and give an intermideat i.e, N-bromoamide. In this reaction when bromine molecules come near with the lone pair electrons . polarisation develop in bromine molecule. ● Step - 2 : Reaction between N - bromoamide and KOH : In the second step N - bromoamide contain more acidic hydrogen than that is in original amide , the second proton remove from the N - bromoamide and anion is form. ● Step - 3 : Formation of ni...