MCQ
Among the following which one is most basic?
- ANH3
- BCH3NH2
- CCH3CH2NH2
- DC6H5NH2
✓
Answer
- CH3CH2NH2
Explanation:
The basicity of the among compounds is due to the presence of lone pair on Nitrogen.
CH3CH2NH2 is more basic than NH3 because of electron-donating group in CH3CH2NH2 increases the electron density on nitrogen atom.
CH3NH2 is less basic than CH3CH2NH2 because of ethyl group present in ethylamine which increases electron density on N in ethylamine and attracts H+ better than methylamine.
C6H5NH2 is less basic than ethylamine because in C6H5NH2 the lone pair of electron on nitrogen is less available for protonation. It is delocalised into the Benzene ring by resonance.
In ethylamine no such delocalisation takes place.
Hence, among them CH3CH2NH2 is most basic.
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