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Sigma bonds are stronger than pi bonds because sigma bonds head-on overlap while pi bonds overlap side by side. When there is one bond, that forms a sigma bond. When there are two bonds, there is one sigma bond and pi bond. When there are three bonds, there are 2pi bonds and one sigma bond.
Nohemi Garcia 1I wrote:Sigma bonds consist of two orbitals, one electron overlap from end to end, and can rotate. Pi bonds also have two orbitals with one electron overlap, but its side by side, and they cannot rotate.
In addition to this, know that a sigma bond is a single bond, a double bond has one sigma bond and one pi bond, and a triple bond has one single bond and 2 pi bonds.
Single bonds have 1 sigma bond, double bonds have 1 sigma bond and 1 pi bond, and triple bonds have 1 sigma bond and 2 pi bonds. Pi bonds are significantly harder to break as they do not allow rotation and have a higher energy state than sigma bonds. Thus, bonds with more pi bonds are more difficult to break.
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