Talk:Porphine
Add topicLatest comment: 1 month ago by Nwbeeson in topic Resonance
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Resonance
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This is not a depiction of two resonance structures. If you draw an axis through either pair of diagonal nitrogens and rotate the molecule 180° around that axis, then you get the other structure, including the placement of all double bonds. They are the same resonance structure depicted before and after the rotation. I removed it. Nick Beeson (talk) 16:23, 11 June 2026 (UTC)