hinsberg test

Question

Hinsberg reagent (benzenesulfonyl chloride) is used to distinguish:

RankGuru · Accepted Answer

The **Hinsberg Test** uses **Benzenesulfonyl chloride ($C_6H_5SO_2Cl$)** to differentiate between classes of amines:
1. **Primary ($1^\circ$) Amines**: React to form a sulfonamide which contains an acidic hydrogen on nitrogen. Thus, it is **soluble in alkali ($NaOH$)**.
2. **Secondary ($2^\circ$) Amines**: React to form a sulfonamide with NO acidic hydrogen. Thus, it is **insoluble in alkali**.
3. **Tertiary ($3^\circ$) Amines**: Do not react with the reagent as they lack an $H$ atom on Nitrogen. They remain soluble in the acidic reagent but insoluble once the solution is made basic.

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More hinsberg test Practice Questions

In Hinsberg test, secondary amine gives product that is: