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Molecular Shape

Posted: Sun Nov 24, 2019 9:36 pm
by Aedra Li 3H
Do sigma and pi bonds influence a molecule's shape, if so how?

Re: Molecular Shape

Posted: Sun Nov 24, 2019 9:39 pm
by SVajragiri_1C
No, sigma and pi bonds do not influence a molecule's shape (in other words, the type of bond doesn't affect the shape).

Re: Molecular Shape

Posted: Sun Nov 24, 2019 10:07 pm
by Kendall 3H
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.

Re: Molecular Shape

Posted: Sun Nov 24, 2019 10:15 pm
by Jasmine Summers 4G
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.

Re: Molecular Shape

Posted: Mon Nov 25, 2019 6:53 am
by Cynthia Rodas 4H
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.

Re: Molecular Shape

Posted: Mon Nov 25, 2019 7:38 am
by AronCainBayot2K
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.

Re: Molecular Shape

Posted: Mon Nov 25, 2019 12:51 pm
by sarahforman_Dis2I
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.

Re: Molecular Shape

Posted: Tue Nov 26, 2019 11:24 am
by Merin Padayatty 3G
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.

Re: Molecular Shape

Posted: Tue Nov 26, 2019 11:26 am
by Lizette Noriega 1H
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

Re: Molecular Shape

Posted: Tue Nov 26, 2019 9:20 pm
by Megan Jung 3A
No, sigma and pi bonds do not affect the molecular shape of a molecule. However, they determine whether the bond can rotate or not.

Re: Molecular Shape

Posted: Tue Nov 26, 2019 9:52 pm
by Osvaldo SanchezF -1H
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.

Re: Molecular Shape

Posted: Tue Dec 03, 2019 12:29 pm
by 605208780
No but they determine whether or not the bond is able to rotate.