R−N≡C+4[H]⟶LAIH42∘ amine R−NH−CH3 On reaction with LiAlH4, Isocyanate groups gives secondary amines whereas, alkyl cyanides give 1∘ amine on reduction. Related Theory LiAlH 4 is a nucleophilic reducing agent since the hydride transfer to the carbonyl carbon occurs prior to the coordination to the carbonyl oxygen. It reacts faster with electron deficient carbonyl groups. The reactivity of carbonyl compounds with this reagent follows the order: Aldehydes > Ketones > ester > amide > carboxylic acid.
Which one of the following on reduction with lithium aluminium hydride yields a secondary amine?
NEET UG 2007 — Chemistry Organic Chemistry
2007mcqmedium
Which one of the following on reduction with lithium aluminium hydride yields a secondary amine?
Official previous-year question
Held on 30 Apr 2007 · Verified 9 Jul 2026.
Options
- A
Methylisocyanide
- B
Acetamide
- C
Methyl cyanide
- D
Nitroethane
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