CBSE Class 12 · 2015 · Delhi · Compounds Containing NitrogenLong Answer

An aromatic compound 'A' of molecular formula C₇H₇ON undergoes the series of reactions shown in the figure. Write the structures of A, B, C, D and E.

Solution

_{7}

_{7}

ON with Hofmann-type chemistry ⇒ \textbf{A = benzamide, C

_{6}

_{5}

CONH

_{2}

}.
B: aniline (Br

_{2}

/KOH, Hofmann).
C: benzenediazonium chloride (NaNO

_{2}

/HCl, 273 K).
D and E: read the printed reagents off the figure — H

_{2}

O/Δ → phenol; CuCl/HCl → chlorobenzene; KI → iodobenzene; H

_{3}

_{2}

→ benzene — and write the two the sequence shows.

CBSE Class 12 Board · 2015 · Delhi · Subjective