Question

In the Hinsberg method for separation of primary, secondary, and tertiary amines, the reagent used is:

• A. Nitrous acid
• B. CHCl₃ + aq. NaOH
• C. \(\text{C}_6\text{H}_5\text{SO}_2\text{Cl}\)
• D. HCl / ZnCl₂

Hint:

In the Hinsberg test, primary amines form soluble sulfonamide salts, secondary amines form insoluble salts, and tertiary amines do not react with benzenesulfonyl chloride.

Answer 1

The Correct Option is C

The Hinsberg method is used for the separation of primary, secondary, and tertiary amines. The reagent used in this method is \(\text{C}_6\text{H}_5\text{SO}_2\text{Cl}\), commonly known as benzenesulfonyl chloride. This reagent reacts differently with primary, secondary, and tertiary amines, forming soluble or insoluble derivatives based on the amine type.