Advertisements
Advertisements
प्रश्न
Write short notes on acetylation.
उत्तर
The process of introducing an acetyl group \[\begin{array}{cc}
\phantom{.....}\ce{O}\\
\phantom{.....}||\\
\ce{(CH3 - C - )}
\end{array}\] into a molecule is called acetylation. The reaction occurs by nucleophilic substitution. There occurs a replacement of the hydrogen atom of −NH2 or > NH by the acetyl group.
Common acetylating agents used are acetyl chloride and acetic anhydride.
\[\begin{array}{cc}
\ce{O}\phantom{................}\ce{O}\phantom{..}\\
||\phantom{.................}||\phantom{..}\\
\ce{CH3CH2NH2 + CH3 - C - Cl -> \underset{N-Ethylacetamide}{CH3 - C - NH - CH2CH3} + HCl}
\end{array}\]
APPEARS IN
संबंधित प्रश्न
How is chlorobenzene prepared from aniline?
What is the action of acetic anhydride on ethylamine?
What is the action of the following reagents on aniline?
Bromine water
Give reasons for the following:
Aniline does not undergo Friedel- Crafts reaction.
Write the structures of main products when aniline reacts with the following reagents :
Br2 water
Write the chemical equations involved when aniline is treated with the following reagents:
Br2 water
Account for the following:
Although the amino group is o, p-directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m-nitroaniline.
What is the action of the following reagents on aniline?
Hot and conc. sulphuric acid
Illustrate the following reactions giving suitable example in each case
Acetylation of amines
How will you convert the following?
Aniline into N−phenylethanamide
In the nitration of benzene using a mixture of conc. \[\ce{H2SO4}\] and conc. \[\ce{HNO3}\], the species which initiates the reaction is ______.
What is the role of \[\ce{HNO3}\] in the nitrating mixture used for nitration of benzene?
When bromination of aniline is carried out by protecting – NH2. The major product is
In the following reaction, the reason for why meta-nitro product also formed is:
How can the activating effect of the −NH2 group in aniline be controlled?
Assertion (A): Bromination of benzoic acid, gives m-bromobenzoic acid.
Reason (R): Carboxyl group increases the electron density at the meta position.
