When a pure secondary () amine is thoroughly subjected to Hinsberg's test (reaction with benzenesulphonyl chloride followed by excess ), what is observed?

Question

When a pure secondary ($2^\circ$) amine is thoroughly subjected to Hinsberg's test (reaction with benzenesulphonyl chloride followed by excess $KOH$), what is observed?

Prashant Kotian · Accepted Answer

Correct answer: B. A amine reacts to generate an N,N-dialkylbenzenesulphonamide. Because the nitrogen is fully alkylated, it totally lacks any remaining acidic protons. Consequently, it cannot react with the strong base and remains a water-insoluble solid.

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