JEE Advanced · 2021 · 03 Oct 2021 · Paper 2 · Compounds Containing Nitrogen

Correct option(s) for the following sequence of reactions is(are)

(A) $Q = KNO_{2}, W = LiAlH_{4}$
(B) $R =$ benzenamine, $V = KCN$
(C) $Q = AgNO_{2}, R =$ phenylmethanamine✓ Correct
(D) $W = LiAlH_{4}, V = AgCN$ ✓ Correct

Answer: (C), (D)

Solution

In the given reaction sequence,

Q = AgNO_{2}

leads to the formation of a nitro compound that upon reduction gives

R =

phenylmethanamine (benzylamine). The reagent

W = LiAlH_{4}

is a strong reducing agent suitable for reducing nitriles or other functional groups.

V = AgCN

(silver cyanide) gives isocyanides in substitution reactions, which fits the reaction pathway. Options (C) and (D) correctly identify these reagents and products.

JEE Advanced · 2021 · 03 Oct 2021 · Paper 2 · One or more correct options

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