JEE Main · 2021 · 01 Sep 2021 · Shift 2 · Compounds Containing Nitrogen

Which one of the following gives the most stable Diazonium salt?

(A)(see structure)
(B) $CH_{3} - CH_{2} - CH_{2} - NH_{2}$
(C)(see structure)
(D)(see structure)
✓ Correct

Answer: (D)

Solution

A stable diazonium salt forms only from a primary aromatic amine, where the diazonium group is stabilised by delocalisation into the ring; aliphatic diazonium ions decompose at once. Among the structures only

4

-methylaniline (

p

-toluidine) is a primary aromatic amine, so it gives the most stable diazonium salt.

JEE Main · 2021 · 01 Sep 2021 · Shift 2 · Single correct option

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