# How many sigma and pi bonds are present in buta-1-3-di-ene ?

May 12, 2018

Each double bond has one $\pi$ bond, and denoted by the structure, there are three $\sigma$ bonds between the carbons.

Moreover, each $C - H$ bond constitutes another $\sigma$ bond. In this case there are 6.

Hence, this species has,

2 $\pi$ bonds, and
9 $\sigma$ bonds.

May 12, 2018

$9 \sigma \text{ and "2pi " bonds}$

#### Explanation:

As you can see, there are only two double bonds, which result in two $\pi$ bonds. The rest are all $\sigma$ bonds, including two from the double bonds.