Give one chemical test to distinguish between the following pairs of compounds.
Secondary and tertiary amines
Hinsberg’s reagent (benzenesulphonyl chloride, C6H5SO2Cl). can be used to distinguish secondary and tertiary amines.
Hinsberg Test: Secondary amines react with Hinsberg’s reagent to form a product that is insoluble in an alkali. For example, N, N−diethylamine reacts with Hinsberg’s reagent to form N,
N−diethylbenzenesulphonamide, which is insoluble in an alkali. Tertiary amines, however, do not react with Hinsberg’s reagent.
Reaction:
2