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Why pyridine is a much weaker base than ...

Why pyridine is a much weaker base than aliphatic amines ?

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Pyridine is a weaker base than `R (##KSV_ORG_P1_C04_E01_007_S02##) NH_(2)` due to +I effect in aliphatic amine (aliphatic amine gt aromatic amine).
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