Primary and secondary amines are distinguished by

Question

Primary and secondary amines are distinguished by (A) Br2/KOH (B) HClO (C) HNO2 (D) NH3

Tardigrade Admin · Accepted Answer

Primary and secondary amines are distinguished by nitrous acid

H N O_{2}

Primary amines when reacted with nitrous acid forms alcohols and secondary amines when reacted with nitrous acid forms N-nitroso derivative.

1^{0}

Amines:

R - N H_{2} H N O_{2} R - N^{+} \equiv N X^{-} \to R^{+} \to R - O H

(alcohol)

2^{0}

Amines:

R_{2} - N H H N O_{2} R_{2} - N - NO

(N - nitroso derivative)

Q. Primary and secondary amines are distinguished by