Strength of Sigma and Pi Bonds

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Nathan Mariano 2G
Posts: 68
Joined: Fri Sep 28, 2018 12:29 am

Strength of Sigma and Pi Bonds

Postby Nathan Mariano 2G » Fri Nov 30, 2018 10:20 pm

Is there a reason why sigma bonds are stronger than pi bonds?

Samantha Ito 2E
Posts: 64
Joined: Fri Sep 28, 2018 12:29 am

Re: Strength of Sigma and Pi Bonds

Postby Samantha Ito 2E » Fri Nov 30, 2018 11:51 pm

It has to do with the orientation of overlapped orbitals. Sigma bonds are formed by end-to-end overlapping while pi bonds are formed by lateral overlapping. The extent of overlapping is maximized in sigma bonds and is therefore stronger than pi bonds.

Ivan Tadeja 4B
Posts: 31
Joined: Fri Sep 28, 2018 12:28 am

Re: Strength of Sigma and Pi Bonds

Postby Ivan Tadeja 4B » Tue Dec 04, 2018 2:24 pm

The overlap of pi bonds are smaller than the overlap of sigma bonds, making pi bonds easier to break apart. Hence, sigma bonds are stronger.

Sameen Mahmood 3D
Posts: 37
Joined: Wed Jun 13, 2018 3:00 am

Re: Strength of Sigma and Pi Bonds

Postby Sameen Mahmood 3D » Tue Dec 04, 2018 2:28 pm

Sigma bonds overlap more closely across the internuclear axis. The concentration of electrons brings the nuclei closer together (harder to detach).

Yiting_Gong_4L
Posts: 69
Joined: Fri Sep 28, 2018 12:25 am

Re: Strength of Sigma and Pi Bonds

Postby Yiting_Gong_4L » Tue Dec 04, 2018 4:57 pm

sigma bonds are stronger because the overlap of the sigma bond is smaller than the pi bond so it is harder to break apart.

Michael_Navarro_1H
Posts: 29
Joined: Fri Sep 28, 2018 12:17 am

Re: Strength of Sigma and Pi Bonds

Postby Michael_Navarro_1H » Tue Dec 04, 2018 5:35 pm

You can also think of pi bonds as relating to double bonds while sigma bonds only refer to single bonds.


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