Question

Write the reaction when ethylamine is treated with Hinsberg’s reagent.

What is the action of following on ethylamine:

Hinsberg reagent

Answer 1

When ethylamine (C₂H₅NH₂) reacts with Hinsberg’s reagent, it forms N-ethylbenzene sulfonamide, which is soluble in alkali (NaOH).

\[\begin{array}{cc}
\phantom{.....................}\ce{O}\\
\phantom{.....................}||\\
\ce{\underset{Ethylamine}{C2H5NH2} + \underset{Hinsberg’s reagent}{C6H5SO2Cl} ->[][-HCl] C6H5S - NH - C2H5}\\
\phantom{.....................}||\\
\phantom{.....................}\ce{\underset{N-ethylbenzene sulfonamide}{O}}
\end{array}\]

Answer 2

Benzenesulphonyl chloride, C₆H₅SO₂Cl, is known as the Hinsberg reagent.