JEE MAIN - Chemistry (2019 - 8th April Morning Slot - No. 8)
In the following compounds, the decreasing order of basic strength will be :
(C2H5)2NH > NH3 > C2H5NH2
NH3 > C2H5NH2 > (C2H5)2NH
(C2H5)2NH > C2H5NH2 > NH3
C2H5NH2 > NH3 > (C2H5)2NH
Explanation
Because of +I effect of -C2H5 group, C2H5NH2 and (C2H5)2NH are more basic than NH3.
When with amine ethyl group (-C2H5) present then basic strength order :
2o amine > 3o amine > 1o amine
Note :
When with amine methyl group (-CH3) present then basic strength order :
2o amine > 1o amine > 3o amine
When with amine ethyl group (-C2H5) present then basic strength order :
2o amine > 3o amine > 1o amine
Note :
When with amine methyl group (-CH3) present then basic strength order :
2o amine > 1o amine > 3o amine
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