NEET2026ChemistryChapterActual
Consider the following chemical reactions: (I) Benzamide Br₂, NaOH Product A (II) Benzamide [ (ii) H₂O] (i) LiAlH₄ Product B (III) Phenyl isocyanide [ (ii) H₂O] (i) LiAlH₄ Product C (IV) Benzonitrile H₂ / Ni Product D Which of the above reactions will yield a primary amine as the major product?
Options
- A(I) and (II) only
- B(II), (III) and (IV) only
- C(I), (II) and (IV) only
- D(I), (III) and (IV) only
Correct answer
C. (I), (II) and (IV) only
Step-by-step solution
Reaction (I) is Hoffmann bromamide degradation. Benzamide ( C₆H₅CONH₂ ) reacts with Br₂ and NaOH to give aniline ( C₆H₅NH₂ ), which is a primary amine. Reaction (II) is the reduction of an amide. Benzamide on reduction with LiAlH₄ gives benzylamine ( C₆H₅CH₂NH₂ ), which is a primary amine. Reaction (III) is the reduction of an isocyanide. Phenyl isocyanide ( C₆H₅NC ) on reduction with LiAlH₄ gives N-methylaniline ( C₆H₅NHCH₃ ), which is a secondary amine. Reaction (IV) is the reduction of a nitrile. Benzonitrile (