# How many sigma and pi bonds are in xylene?

##### 1 Answer

Jun 21, 2016

There are

There are three isomers of xylene, but they all contain the same number of

An easy way to count these is to treat the skeletal structure as all

So, taking

- All hexagons have six sides, contributing
**6**#sigma# bonds. - Each
#"C"-"H"# bond on the benzene ring adds one#sigma# bond, for a total of**4**. - The
#"C"-"C"# bond with each methyl group counts as one#sigma# bond, contributing a total of**2**#sigma# bonds. - The three
#"C"-"H"# bonds on each methyl group contribute a total of**6**more#sigma# bonds.

So, we have a total of **18**

Inside the benzene ring, you have *delocalized*

So the result is **18** **3**