Question

Why o-toluidine is more basic than aniline?

Answer 1

$<b><u>$Lower the pKb value, stronger is the base. Aniline has an NH2 group which readily accepts a proton to give anilinium ion. Ortho toluidine is anilinewith an additional methyl group inortho position.So the equilibrium is towards the left, making it less basic.

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