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Homework Help: Total number of C-C sigma bond in phenylethene

  1. Jun 23, 2014 #1
    1. The problem statement, all variables and given/known data

    how many is total number of C-C sigma bond in phenylethene?

    2. Relevant equations

    3. The attempt at a solution

    i have drawn the the strucutre as in the photo. i ended up getting 8 C-C sigma bond. but the ans from my book is 12. How to get 12?

    Attached Files:

  2. jcsd
  3. Jun 23, 2014 #2
    How many sigma (σ) bonds are in a single bond?

    How sigma (σ) bonds are in a double bond?
  4. Jun 23, 2014 #3
    Even after answering those questions, I don't think the OP's answer would change. I would say that the OP is correct and the book has an error.
  5. Jun 23, 2014 #4
    1 σ in single bond, 1 σ and 1 pi bond in double bond.
  6. Jun 23, 2014 #5
    I would agree that OP is correct and that the number of C-C sigma bonds is 8.
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