In the diazotization of aryl amine, the use of nitrous acid is that

Question

In the diazotization of aryl amine, the use of nitrous acid is that (A) it suppresses hydrolysis of phenol (B) it is a source of electrophilic nitrosonium ion (C) it neutralizes the base liberated (D) All of the above

Tardigrade Admin · Accepted Answer

The diazotization of amines is believed to occur the following mechanism O=N- overset•• underset••OH+H+ leftharpoons O=N- underset•• overset+O H2 arrow underset textnitrosonium ion overset+N = O + H2O <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/18e4dd2832a4dff9bf769e503c9c06f2-.png" />

Q. In the diazotization of aryl amine, the use of nitrous acid is that

it suppresses hydrolysis of phenol

it is a source of electrophilic nitrosonium ion

it neutralizes the base liberated

All of the above

The diazotization of amines is believed to occur the following mechanism
$O = N - •• O H •• + H^{+} ⇌ O = N - •• O H_{2} +$
$\to nitrosonium ion N + = O + H_{2} O$

Q. In the diazotization of aryl amine, the use of nitrous acid is that

it suppresses hydrolysis of phenol

it is a source of electrophilic nitrosonium ion

it neutralizes the base liberated

All of the above

The diazotization of amines is believed to occur the following mechanism O=N−••OH​••​+H+⇌O=N−••OH2​+​​ →nitrosonium ionN+=O​+H2​O

The diazotization of amines is believed to occur the following mechanism
$O = N - •• O H •• + H^{+} ⇌ O = N - •• O H_{2} +$
$\to nitrosonium ion N + = O + H_{2} O$