During qualitative organic analysis, an unknown amine is treated with a cold mixture of and (Libermann's nitroso reaction). A distinct, heavy yellow oily liquid rapidly separates from the aqueous phas

Question

During qualitative organic analysis, an unknown amine is treated with a cold mixture of $NaNO_2$ and $HCl$ (Libermann's nitroso reaction). A distinct, heavy yellow oily liquid rapidly separates from the aqueous phase. What is the structural classification of this amine?

Prashant Kotian · Accepted Answer

Correct answer: B. Both aliphatic and aromatic secondary () amines lack the necessary hydrogen atoms to form diazonium species. Instead, they react cleanly with nitrous acid to form extremely characteristic, water-insoluble N-nitrosamines (), which physically present as distinct yellow oily liquids.

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