What is the action of nitrous acid on :
(a) Primary nitroalkane
(b) Secondary nitroalkane
(c) Tertiary nitroalkane

Video Solution

Text Solution

Verified by Experts

(a) Primary nitroalkanes react with nitrous acid to form nitrolic acid which dissolves in sodium hydroxide giving red solution
$\begin{matrix} NOH NONa || || C H_{3} C H_{2} N O_{2} + O = N . O H \to C H_{3} - C - N H_{2} N a O H - -- \to C H_{3} - C - N O_{2} Nitrous acid Nitrolic acid Sod. nitrolate (red) \end{matrix}$
(b) Secondary nitroalkanes react with nitrous acid to give colourless crystalline pseudo nitroles which gives blue colour in solution
$\begin{matrix} H N = O | | R - C - N O_{2} + H O N = O \to R - C - N O_{2} + H_{2} O | | R R Pseudo nitrole (blue) \end{matrix}$
(c) Tertiary nitro alkanes do not react with nitrous acid because they do not contain any $α$ -hydrogen.

|

Updated on:21/07/2023

Class 12 CHEMISTRY OCTOBER 2015

Related Playlists

Similar Practice Problems

Question 1 - Select One
$α$ -nitroalkene is converted into nitroalkane by
Aoxidation
Btreating it with $K N O_{2}$ and followed by hydrolysis
Cacid hydrolysis
Dalkaline hydrolysis
Question 1 - Select One
Which of the following is nitroso nitroalkane of primary nitro alkane ?
A $R - N O_{2} ∣ C ∣ R - N = O$
B $R - O - N O_{2} C ∣ R - N = O$
C $R - N O_{2} ∣ C ∣ H - N = O$
D $R - O - N O ∣ C ∣ H - N = O$
Question 1 - Select One
Which of the following is tertiary nitroalkane ?
A $C H_{3} - C H_{3} ∣ C ∣ C H_{3} - C H_{2} - O - N = O$
B
C $C H_{3} - C H_{3} ∣ C ∣ C H_{3} - O - N = O$
D
Question 1 - Select One
In halogention of nitroalkane
Aall halogon are replaced by halogenes
Ball $α$ -H are replaced by halogens
Call $β$ - H are replaced by halogens
Donly one $α$ -H replaced by halogaen

Similar Questions

GURUKUL PUBLICATION - MAHARASHTRA PREVIOUS YEAR PAPERS- OCTOBER 2015-Section - II

Home
Ask Doubt
Profile