Question

Which of the following amine does not react with Hinsberg reagent :

• A. Neopentyl amine
• B. Isopropyl amine
• C. Triethyl amine
• D. Ethyl methyl amine

Answer 1

The correct option is C Triethyl amine

Only $1^{\circ }$ and $2^{\circ }$ amine react with Hinsberg reagent as they both contain acidic hydrogen and get replaced on reaction with Hinsberg reaent i.e., benzene sulphonyl chloride $3^{\circ }$ amine can not reacts with Hinsberg reagent as they do not contain replaceable hydrogen. Therefore, triethyl amine
$(C_2{H}_5{)}_{3}N$ which is $3^{\circ }$ amine can not react with Hinsberg reagent.