# 13.2     Give one chemical test to distinguish between the following pairs of compounds.                 (ii) Secondary and tertiary amines

Secondary and tertiary amines can be distinguished by reacting them with Hinsberg's reagent which is also called benzenesulphonyl chloride.$(C_{6}H_{5}SO_{2}Cl)$ In the case of primary amine the product is soluble in alkali but not in secondary amine case. And tertiary amine does not react with this reagent.
Tertiary amine + benzenesulphonyl chloride  $\rightarrow$ no reaction