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Structural isomers of C4H8Br2

  1. Mar 17, 2008 #1
    1. The problem statement, all variables and given/known data
    Name the structural isomers of C4H8Br2 and remember to number the carbon atoms such that you minimize the numbers in the name.

    How many stuctural isomers of C4H8Br2 are there?


    3. The attempt at a solution
    I'm not sure how many there should be. So far I've found 9:
    1,1-dibromobutane
    1,2-dibromobutane
    1,3-dibromobutane
    1,4-dibromobutane
    2,2-dibromobutane
    2,3-dibromobutane
    1,1-dibromo-2-methylpropane
    1,2-dibromo-2-methylpropane
    1,3-dibromo-2-methylpropane


    Are there anymore that I'm missing? I can't seem to find them.
     
    Last edited: Mar 17, 2008
  2. jcsd
  3. Mar 19, 2008 #2
    Don't forget chirality.
     
  4. Mar 19, 2008 #3
    I don't think chirality will affect the actual formula name anymore since I've taken care of all chiral forms by putting the Br atoms attached to different carbons.
     
  5. Mar 19, 2008 #4
    Oh, you're right. Structural isormers, not stereoisomers.

    In that case, I think you've got them all.
     
  6. Mar 23, 2009 #5
    How many stereocentres are there?

    0 correct?
     
  7. Mar 23, 2009 #6

    chemisttree

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    No, I see at least two from the list given.
     
  8. Mar 23, 2009 #7
    1,2-dibromo-2-methylpropane
    1,3-dibromo-2-methylpropane

    Being the two? The stereocentre is on the first carbon in both cases right?

    Sorry for the numerous questions, I'm just a little confused!
     
  9. Mar 23, 2009 #8

    chemisttree

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    Make a model and try to superimpose 'em.
     
  10. Mar 23, 2009 #9
    I found four to have stereocentres:
    1,2-dibromobutane
    1,3-dibromobutane
    2,3-dibromobutane
    1,2-dibromo-2-methylpropane

    Can anyone confirm this?
     
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