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प्रश्न
Give reasons for the following:
CH3NH2 is more basis than C6H5NH2.
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उत्तर
Aromatic amines are far less basic than aliphatic amines. This can be explained as follows:
Resonance stabilisation is there in aniline. It can be regarded as a resonance hybrid of the following structures:
Hence, the lone pair of electrons on the nitrogen atom gets delocalised over benzene ring and thus is less available for protonation.
The electron density on the nitrogen atom is increased by electron-donating inductive effect of the alkyl groups. As a result, aliphatic amines are much stronger bases than aniline.
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संबंधित प्रश्न
The product formed by the reaction an aldehyde with a primary amine ____________.
The order of basic strength for methyl substituted amines in aqueous solution is ____________.
Which one of the following is most basic?
Arrange the following.
Increasing order of basic strength C6H5NH2, C6H5N(CH3)2, (C2H5)2NH and CH3NH2.
The main product is formed by treating an alkyl or benzyl halide with excess ammonia ____________.
Complete the following reaction.
\[\begin{array}{cc}
\ce{O}\phantom{.........}\\
||\phantom{.........}\\
\ce{H - \underset{(A)}{C} - NH - CH3}
\end{array}\]
and
\[\begin{array}{cc}
\ce{O}\\
||\\
\ce{CH3 - \underset{(B)}{C} - NH2}
\end{array}\]
are which type of isomers?
Which among the following is the strongest Bronsted base?
Assertion A: Aniline on nitration yields ortho, meta and para nitro derivatives of aniline.
Reason R: Nitrating mixture is a storng acidic mixture.
In the light of the above statements, choose the correct answer from the options given below:
Account for the following:
Aniline does not undergo Friedel-Crafts reaction.
