MHT CET 2025 Chemistry question
What is the loss in molar mass when a primary amine is obtained by Hofmann degradation of amide?
Answer: (C)
Solution
In the Hofmann bromamide degradation an amide is converted to a primary amine with one carbon atom less: \mathrm{R{-}CONH_2 + Br_2 + 4NaOH \to R{-}NH_2 + Na_2CO_3 + 2NaBr + 2H_2O}. The carbonyl carbon is lost (as carbonate) and nitrogen stays attached to R. Molar mass of the amide is
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