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Chemistry
The correct order of the basic strength of methyl substituted amines in aqueous solution is :
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Q. The correct order of the basic strength of methyl substituted amines in aqueous solution is :
NEET
NEET 2019
Amines
A
$(CH_3)_3N > (CH_3)_2NH > CH_3NH_2$
15%
B
$CH_3NH_2> (CH_3)2NH > (CH_3)_3N$
12%
C
$(CH_3)_2NH > CH_3NH_2 > (CH_3)_3N$
67%
D
$(CH_3)_3N > CH_3NH_2> (CH_3)_2NH$
6%
Solution:
In aqueous solution, electron donating inductive effect, solvation effect (H-bonding) and steric hindrance all together affect basic strength of substituted amines Basic character :
$\underset{{ 2^{\circ}}}{ (CH_3)_2NH } > \underset{{ 1^{\circ}}}{CH_3NH_2 } > \underset{{ 3^{\circ}}}{ (CH_3)_3N }$