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

2 Answers
May 12, 2018

Consider 1,3-butadiene,

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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.

Answer:

#9 sigma" and "2pi " bonds"#

Explanation:

http://www.essentialchemicalindustry.org/chemicals/buta-13-diene.html

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.