Home > Community > Why Nucleophilic substitution of pyridine undergoes at C2 and C4 but not on C3?
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Loren McCune

Why Nucleophilic substitution of pyridine undergoes at C2 and C4 but not on C3?

Axiel Mohamad  Follow
Draw the mechanism, including all resonance structures for the anionic intermediate. Then, think about them. Where is negative charge more stable in anions? That will explain it.

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Claudio Civanelli  Follow
the positive charge is on C2, C4 and C6 on the resonance structures? but I still do not understand why

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