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Q.
The correct order of basicity of the following amines is
KVPYKVPY 2019Amines
Solution:
$I$ is most basic, because the lone pair of nitrogen is not delocalised by resonance in that, but in all others, there is resonance with benzene ring.
$Ill$ is more basic than II due to $+R $ (or $+M$) effect of $CH_3$,and $IV$ is less basic than $II$ because of $−R$ (or $−M$)effect of $—NO_2$, i.e. correct order is $ I > III > II > IV$.
