Chemistry - AMINES Question with Solution | TestHub

Nitriles ($R-CN$) can be reduced to primary amines ($R-C{H}_{2}N{H}_2$) using strong reducing agents or catalytic hydrogenation.

Reagent A: ${\text{LiAlH}}_4$ followed by hydrolysis is a strong reducing agent that reduces nitriles to primary amines.

Reagent C: ${\text{H}}_2/\text{Ni}$ (catalytic hydrogenation) reduces nitriles to primary amines.

Reagent D: $\text{Na(Hg)}/{\text{C}}_2{\text{H}}_5\text{OH}$ (Mendius reduction) provides nascent hydrogen and reduces nitriles to primary amines.

Reagent B: $\text{Sn}+\text{HCl}$ is typically used to reduce nitro compounds to amines. (Note: ${\text{SnCl}}_2+\text{HCl}$ is used in Stephen reduction to convert nitriles to aldehydes).

Reagent E: ${\text{Br}}_2/\text{aq. NaOH}$ is used for Hoffmann bromamide degradation to convert amides to primary amines, not nitriles.

Thus, A, C, and D are the correct reagents.

Answer: A, C and D only