Molecular Shape

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Aedra Li 3H
Posts: 40
Joined: Fri Aug 30, 2019 12:17 am

Molecular Shape

Postby Aedra Li 3H » Sun Nov 24, 2019 9:36 pm

Do sigma and pi bonds influence a molecule's shape, if so how?

SVajragiri_1C
Posts: 115
Joined: Thu Jul 11, 2019 12:16 am

Re: Molecular Shape

Postby SVajragiri_1C » Sun Nov 24, 2019 9:39 pm

No, sigma and pi bonds do not influence a molecule's shape (in other words, the type of bond doesn't affect the shape).

Kendall 3H
Posts: 52
Joined: Wed Sep 18, 2019 12:18 am

Re: Molecular Shape

Postby Kendall 3H » Sun Nov 24, 2019 10:07 pm

sigma and pi bonds do not effect the lewis structure; however, they do effect how the molecule is shaped and how its shape can change because sigma bonds allow for more rotations and movement of the molecules whereas pi bonds do not allow for this full range of motion.

Jasmine Summers 4G
Posts: 50
Joined: Wed Sep 18, 2019 12:17 am

Re: Molecular Shape

Postby Jasmine Summers 4G » Sun Nov 24, 2019 10:15 pm

The only difference is that sigma bonds allow for rotation, while pi bonds don't. However, with molecular shape, double and single bonds are treated as the same, so it doesn't affect bond shape.

Cynthia Rodas 4H
Posts: 51
Joined: Wed Sep 18, 2019 12:21 am

Re: Molecular Shape

Postby Cynthia Rodas 4H » Mon Nov 25, 2019 6:53 am

Technically, sigma and pi bonds do affect bond length and bond angles. However, the change is minimal so it therefore doesn't have much influence on the molecular shape. Furthermore, the VSEPR model counts single, double, and triple bonds as one region.

AronCainBayot2K
Posts: 101
Joined: Fri Aug 30, 2019 12:17 am

Re: Molecular Shape

Postby AronCainBayot2K » Mon Nov 25, 2019 7:38 am

Sigma and pi bonds do not really affect molecular shape due to bonds (single, double, or triple) being considered as only one region of electron density.

sarahforman_Dis2I
Posts: 109
Joined: Sat Aug 17, 2019 12:18 am

Re: Molecular Shape

Postby sarahforman_Dis2I » Mon Nov 25, 2019 12:51 pm

SVajragiri_1G wrote:No, sigma and pi bonds do not influence a molecule's shape (in other words, the type of bond doesn't affect the shape).


It is important to note, however, that pi bonds cannot rotate. This means that having pi bonds (double and triple bonds), can prevent the molecule from rotating which can impact how flexible a molecule is.

Merin Padayatty 3G
Posts: 52
Joined: Thu Jul 11, 2019 12:16 am

Re: Molecular Shape

Postby Merin Padayatty 3G » Tue Nov 26, 2019 11:24 am

Sigma bonds allow for rotation whereas pi bonds do not. However, single, double, and triple bonds are all considered as only one region of electron density.

Lizette Noriega 1H
Posts: 105
Joined: Wed Sep 18, 2019 12:15 am

Re: Molecular Shape

Postby Lizette Noriega 1H » Tue Nov 26, 2019 11:26 am

They do not influence molecular structure because each bond is considered to be one region of electron density, despite the single/double/triple bonds that can be present

Megan Jung 3A
Posts: 50
Joined: Thu Jul 11, 2019 12:17 am

Re: Molecular Shape

Postby Megan Jung 3A » Tue Nov 26, 2019 9:20 pm

No, sigma and pi bonds do not affect the molecular shape of a molecule. However, they determine whether the bond can rotate or not.

Osvaldo SanchezF -1H
Posts: 122
Joined: Wed Sep 18, 2019 12:21 am

Re: Molecular Shape

Postby Osvaldo SanchezF -1H » Tue Nov 26, 2019 9:52 pm

No the sigma and Pie bonds do not affect the molecular shape of a molecule, only the lone pairs do and the amount of bonds present. They do however affect whether certain atoms will be on the same plane. For example any atom connected to a double or triple bond will be in the same plane because pie bonds cannot rotate unlike sigma bonds.

605208780
Posts: 50
Joined: Wed Sep 18, 2019 12:16 am

Re: Molecular Shape

Postby 605208780 » Tue Dec 03, 2019 12:29 pm

No but they determine whether or not the bond is able to rotate.


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