Question

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Reaction of R -C - NH₂ with a mixture of Br₂ and KOH
produces RNH₂. During the reaction, which of the intermediate
product is formed :
(a) R – NH – Br (b) H – CO – NBr₂
(c) R – N = C = O (d) all of these

Answer 1

During the given reaction, the intermediate

product is formed :

(c) R – N = C = O

- The reaction of RCONH₂ with a mixture of Br₂ and KOH

which produces RNH₂  is generally known as the Hoffman bromamide reaction

- during this reaction, the intermediates formed are N-bromamide (RCONHBr) and isocyanate (RNCO)

-All the other given options do not have any intermediate formed during this reaction

-so the correct option is (c)R – N = C = O