Molecular Shape and Polarity

(Polar molecules, Non-polar molecules, etc.)

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Jasmine 2C
Posts: 150
Joined: Wed Sep 18, 2019 12:18 am

Molecular Shape and Polarity

Postby Jasmine 2C » Fri Nov 22, 2019 12:20 am

Does polarity of atoms in a molecule not affect its molecular shape?

Micah3J
Posts: 84
Joined: Tue Oct 08, 2019 12:16 am

Re: Molecular Shape and Polarity

Postby Micah3J » Fri Nov 22, 2019 12:23 am

I think it just affects the bond angles between the atoms but I could be wrong.

Tiffany Chao 2H
Posts: 98
Joined: Fri Aug 09, 2019 12:17 am

Re: Molecular Shape and Polarity

Postby Tiffany Chao 2H » Fri Nov 22, 2019 1:54 am

If you're talking about a molecule like CHCl3, it's polar. However, the polarity of it doesn't affect the fact that its tetrahedral and all bond angles are 109.5 degrees. The only time bond angles/shape is affected would be due to lone pairs.

Jocelyn Thorp 1A
Posts: 92
Joined: Wed Sep 18, 2019 12:20 am

Re: Molecular Shape and Polarity

Postby Jocelyn Thorp 1A » Fri Nov 22, 2019 2:08 am

the shape affects the polarity (due to the possibility of dipole moments cancelling), but as far as i know it doesn't work the other way around

Miriam Villarreal 1J
Posts: 87
Joined: Sat Aug 17, 2019 12:16 am

Re: Molecular Shape and Polarity

Postby Miriam Villarreal 1J » Fri Nov 22, 2019 10:44 am

if all the outer atoms are the same and symmetric, the dipole moments cancel each other out and become nonpolar. However, a molecule with an unsymmetric shape will be (at least slightly) polar. Additionally lone pair or pairs of electrons on the central atom guarantee a nonuniform distribution of electrons. In terms of polarity affecting shape, it is mainly due to areas of electron density that determine a shape.

KMenjivar_3A
Posts: 25
Joined: Mon Jan 07, 2019 8:05 am

Re: Molecular Shape and Polarity

Postby KMenjivar_3A » Fri Nov 22, 2019 11:10 am

Polarity does affect the shape of the lewis structure. Lone pairs decreases the bond angle due to electron-electron repulsion. As a result, the structure of the molecule will change.


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