MCQ
The correct order of the basic strength of methyl substitited amines in aqueous solution is:
- A(CH3)2NH > CH3NH2 > (CH3)3N
- B(CH3)3N > CH3NH2 > (CH3)2NH
- C(CH3)3N > (CH3)2NH > CH3NH2
- DCH3NH2 > (CH3)2NH > (CH3)3N
✓
Answer
- (CH3)2NH > CH3NH2 > (CH3)3N
Explanation:
In aqueous solution, electron donating inductive effect, solvation effect (H-bonding) and steric hindrance all together affect basic strength of substituted amines.
Basic character:
$(\text{CH}_3)_2\text{NH}>\text{CH}_3\text{NH}_2>(\text{CH}_3)_3\text{N}\\ \ \ \ \ \ \ \ \ \ 2^\circ\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 1^\circ\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 3^\circ$
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