Total number of C-C sigma bond in phenylethene

[desmond iking]

Homework Statement

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

Homework Equations

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?

 

[ChiralWaltz]

How many sigma (σ) bonds are in a single bond?

How sigma (σ) bonds are in a double bond?

 

[Saitama]

How many sigma (σ) bonds are in a single bond?

How sigma (σ) bonds are in a double bond?

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.

 

[desmond iking]

How many sigma (σ) bonds are in a single bond?

How sigma (σ) bonds are in a double bond?

1 σ in single bond, 1 σ and 1 pi bond in double bond.

 

[ChiralWaltz]

I would agree that OP is correct and that the number of C-C sigma bonds is 8.