All GRE Subject Test: Chemistry Resources
Example Question #31 : Organic Chemistry
What is the value of from Huckel's rule for the given aromatic compound?
Huckel's rule states that an aromatic compound must have delocalized electrons. The electrons in each double bond are delocalized for this molecule. There are nine double bonds, and thus eighteen delocalized electrons.
If 4n+2=18, then n=4.