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Resonance in heterocycles – pyrrole
Concepts tested here
- pyrrole-electron-density
All Questions
2016 Phase II 1 question
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In pyrrole, the electron density is maximum on:
Resonance places negative charge mainly at C2 and C5.
Maximum electron density is at positions 2 and 5, as resonating structures III and IV are more stable than II and V, so they are major contributors.