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Naming a hydrocarbon

  1. Nov 30, 2014 #1
    1. The problem statement, all variables and given/known data
    chemproblem.png


    3. The attempt at a solution
    The answer is supposed to be D but I cant figure out why, my method gave me B
    counting the number of points in the longest chain there are 7 and there are only single bonds so without the branches I have heptane. there is a ethyl attached to the second point and a methyl attached to the fourth and fifth point so it should be 2-ethyl-4,5-dimethylheptane
     
  2. jcsd
  3. Nov 30, 2014 #2

    mfb

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    2016 Award

    Staff: Mentor

    The longest chain follows the "upwards branch" and has 8 atoms.
     
  4. Nov 30, 2014 #3
    i get it now. thank you
     
  5. Dec 1, 2014 #4

    DrClaude

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    Staff: Mentor

    The correct answer is C.
     
  6. Dec 1, 2014 #5
    woops that was a typo in the original post. The answer key has it listed as C
     
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