Why does pyrrole undergo electrophilic substitution at position 3?

Answer 1

It doesn't.

Pyrrole preferentially undergoes substitution at #"C2"#.

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Answer 2

Pyrrole undergoes electrophilic substitution at position 3 due to the high electron density on the nitrogen atom, making it a nucleophilic center that attracts electrophiles.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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