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Organic chemistry nomenclature

  1. Jul 2, 2011 #1
    What do the indices 6 and 13 stand for in 6,13-pentacenequinone?

    I know that is related to the position of the substituents in the molecule, but I cannot figure out how to interpret it.

    Can some one point me to a reference where the basics the nomenclature are explained?

  2. jcsd
  3. Jul 4, 2011 #2
    This seems to cover it pretty well.


    We didn't cover things like this in O chem, but I can make a slightly educated guess, in hopes that someone more knowledgeable will come along.

    Edit: I did a bit more research and got it. The carbons are numbered atypically. Oh well, that's typical IUPAC for you, I suppose.

    The picture is now correct, showing that carbon 6 and carbon 13 are the ones with the oxygens attached.

    Attached Files:

    Last edited: Jul 4, 2011
  4. Jul 5, 2011 #3
    Thanks! Now it is clear.
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