Identify A and B in the following reactions:
i) C₂H₅C≡N →LiAlH₄→ A →HNO₂→ B
ii) (the sequence shown in the figure)
Sequence (ii)
i) C₂H₅C≡N →LiAlH₄→ A →HNO₂→ B
ii) (the sequence shown in the figure)
Answer: (i) A = propan-1-amine C₃H₇NH₂; B = propan-1-ol (HNO₂ on 1° aliphatic amine → ROH + N₂). (ii) Per the printed sequence.
Solution
(i)
(ii) Follow the printed arrows: each reagent's standard transformation fixes A then B (diazotisation → substitution, reduction, or coupling as displayed).
(ii) Follow the printed arrows: each reagent's standard transformation fixes A then B (diazotisation → substitution, reduction, or coupling as displayed).
CBSE Class 12 Board · 2003 · Foreign · Subjective