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प्रश्न
Give reasons CH3NH2 is more basic 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
Give reasons for the following: (CH3)2NH is more basic than (CH3)3N in an aqueous solution.
Arrange the following in increasing order of their basic strength :
C6H5 – NH2, C6H5 – CH2 – NH2, C6H5 – NH – CH3
How will you convert Benzene into aniline?
Arrange the following in increasing order of their basic strength:
C2H5NH2, C6H5NH2, NH3, C6H5CH2NH2 and (C2H5)2NH
Account for the following:
Gabriel phthalimide synthesis is preferred for synthesising primary amines.
Accomplish the following conversion:
Benzene to m-bromophenol
Give a plausible explanation for the following:
Why are aliphatic amines stronger bases than aromatic amines?
Which among the following has the highest boiling point?
Among the following isomeric amines, an amine having highest boiling point is:
Which of the following have less melting point than amine?
