Reactivity of pi bonds

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ShastaB4C
Posts: 100
Joined: Thu Sep 26, 2019 12:18 am

Reactivity of pi bonds

Postby ShastaB4C » Sun Nov 24, 2019 5:56 pm

Can someone explain how a sigma bond is stronger than a pi bond if double bonds are stronger than single?

Christine Honda 2I
Posts: 116
Joined: Sat Sep 14, 2019 12:17 am

Re: Reactivity of pi bonds

Postby Christine Honda 2I » Sun Nov 24, 2019 6:06 pm

Sigma bonds result from the head-on overlap of the orbitals of the two atoms, which has more area of overlap than pi bonds which result from the parallel overlap of orbitals. That is why sigma bonds are stronger.

Rebekah Alfred 1J
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am
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Re: Reactivity of pi bonds

Postby Rebekah Alfred 1J » Sun Nov 24, 2019 6:18 pm

A sigma bond by itself is stronger than a pi bond by itself because the atomic orbitals that form sigma bonds overlap more than the orbitals that form pi bonds.

Double bonds are stronger than a single bond because they consist of one sigma bond and one pi bond, whereas a single bond consists of only a sigma bond. Even though a sigma bond alone is stronger than a pi bond alone, the fact that there is both a sigma and pi bond in a double bond make it stronger than just one sigma bond in a single bond.


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