Talk:Pyrene

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I may be wrong, but since Pyrene is aromatic, shouldn't the diagram show rings (similar to Benzopyrene) rather than double and single bonds? It appears to have two (identical, i.e. flipping one gives the other) resonance forms, giving all bonds equal precedence at being single or double. - Nanobug 16:58, 13 September 2005 (UTC)

That's unnecessary, it is evident from the connected system of double bonds. Diagrams such as this are always artificial representations -bonds as connecting lines don't exist anyway. Drawing the different resonance forms is a way to illustrate to the student why the electron density is in fact the same everywhere, but of course, no bond-flipping actually takes place -the electrons simply distribute equally. Since that can be seen from the single structure, adding another resonance structure doesn't really add information. --OliverH 12:48, 2 March 2006 (UTC)