CBSE Class 12 · Aldehydes Ketones and Carboxylic AcidsShort Answer

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Write the structures of compounds A, B and C in the following reactions:
a) CH₃COOH →NH₃, Δ→ A →Br₂/KOH(aq)→ B →CHCl₃ + alc. KOH→ C
b) C₆H₅N₂⁺BF₄⁻ →NaNO₂/Cu, Δ→ A →Fe/HCl→ B →CH₃COCl/pyridine→ C

Solution

(a) A: acetamide, CH

_{3}

CONH

_{2}

(acid + NH

_{3}

, Δ).
B: methanamine, CH

_{3}

_{2}

(Hofmann bromamide degradation).
C: methyl isocyanide, CH

_{3}

NC (carbylamine reaction).
(b) A: nitrobenzene, C

_{6}

_{5}

_{2}

(diazonium + NaNO

_{2}

/Cu).
B: aniline, C

_{6}

_{5}

_{2}

(Fe/HCl reduction).
C: acetanilide, C

_{6}

_{5}

NHCOCH

_{3}

(acetylation in pyridine).

CBSE Class 12 Board · Subjective

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