Sigma bonds


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Shundeen Martinez 1D
Posts: 31
Joined: Fri Sep 28, 2018 12:18 am

Sigma bonds

Postby Shundeen Martinez 1D » Sun Dec 02, 2018 8:03 pm

Why can there be multiple pi bonds but only one sigma bond?

Porus_Karwa_2E
Posts: 72
Joined: Fri Sep 28, 2018 12:24 am

Re: Sigma bonds

Postby Porus_Karwa_2E » Sun Dec 02, 2018 8:06 pm

3 pi bonds and 1 sigma bond means its a quadruple bond.

Tessa Lawler 1A
Posts: 57
Joined: Fri Sep 28, 2018 12:18 am

Re: Sigma bonds

Postby Tessa Lawler 1A » Sun Dec 02, 2018 8:06 pm

I know that when you have a multiple bond like a double or a triple bond, only the first one is a sigma, and all the others are pi bonds. E.g. a triple bond contains one sigma and two pi bonds. But I'm not sure why that is the case structurally.

KatrinaPho_2I
Posts: 60
Joined: Fri Sep 28, 2018 12:28 am

Re: Sigma bonds

Postby KatrinaPho_2I » Sun Dec 02, 2018 10:33 pm

All first bonds are sigma bonds. Any of the bonds on top of the first are considered pi bonds.

Akhil Paladugu 3G
Posts: 30
Joined: Fri Sep 28, 2018 12:26 am

Re: Sigma bonds

Postby Akhil Paladugu 3G » Sun Dec 02, 2018 11:06 pm

The first bond between is always a sigma bond, every additonal bondage (i.e. double, triple bond ) is a pi bond. Therefore a single bond is a sigma bond, but a double bond has one sigma bond and one pi bond, and a triple bond has one sigma bond and 2 pi bonds.

marg44
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Been upvoted: 1 time

Re: Sigma bonds

Postby marg44 » Sun Dec 02, 2018 11:11 pm

For these sigma and pi bonds, is one bond stronger than the other? Or are they of equal strength?

Kelsey Li 3B
Posts: 34
Joined: Fri Sep 28, 2018 12:26 am

Re: Sigma bonds

Postby Kelsey Li 3B » Sun Dec 02, 2018 11:12 pm

Every bond in a molecule is considered a sigma bond. But bonds on top of those are considered pi bonds.

Grace Diaz 3F
Posts: 30
Joined: Fri Sep 28, 2018 12:24 am

Re: Sigma bonds

Postby Grace Diaz 3F » Sun Dec 02, 2018 11:14 pm

Sigma bonds are always single bonds, or the first bonds in a double or triple bond. The remaining bonds of a double or triple bonds are pi bonds. This is easy to visualize when looking at hybridized orbitals. The hybridized sp orbitals form sigma bonds while the unhybridized p orbitals form pi bonds

Ethan Yi 1K
Posts: 62
Joined: Fri Sep 28, 2018 12:28 am

Re: Sigma bonds

Postby Ethan Yi 1K » Sun Dec 02, 2018 11:16 pm

marg44 wrote:For these sigma and pi bonds, is one bond stronger than the other? Or are they of equal strength?


i think a sigma bond alone is stronger than a pi bond would be alone, but a pi bond is never alone, it's always on top of a sigma bond

Shibhon_Shepard
Posts: 62
Joined: Wed Nov 15, 2017 3:04 am

Re: Sigma bonds

Postby Shibhon_Shepard » Fri Dec 07, 2018 11:31 am

marg44 wrote:For these sigma and pi bonds, is one bond stronger than the other? Or are they of equal strength?

Sigma bonds are stronger and pi bonds are weaker.


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