KCET2015ChemistryAmines
Which one of the following amide will not undergo Hoffmann bromamide reaction :
Options
- A( CH ₃ CONH ₂ )
- B( CH ₃ CONHCH ₃ )
- C( C₆ H₅ C O N H₂ )
- D( CH ₃ CH ₂ CONH ₂ )
Correct answer
B. ( CH ₃ CONHCH ₃ )
Step-by-step solution
Only primary amides undergo Hoffmann bromamide reaction to yields primary amines. ( R- O C - NH ₂+ Br ₂+4 ~N a OH ₂ H ₂ O 1^ Amide 1^ Amide NH ₂ +2 NaBr + Na ₂ CO ₃+2 H ₂ O ) Here ( CH ₃ CONHCH ₃ ) is secondary amide, therefore, it does not undergo Hoffmann bromamide reaction.