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Aromatic amines are lesser basic than aliphatic amines.why ?


Aliphatic amines are more basic in nature than aromatic amines because In aliphatic amines the electron density around N atom increases due to - I effect of alky  group and thus chance for proton attack also Increases.
On the other hand in aromatic amines the electron density around N atom decreases due to withdrawing nature of aromatic ring hence thus chance for proton attack on nitrogen atom decreases.

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