Molecular Geometry

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

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Divya Pimparkar 1E
Posts: 30
Joined: Fri Sep 28, 2018 12:19 am

Molecular Geometry

Postby Divya Pimparkar 1E » Sun Nov 18, 2018 5:54 pm

How does molecular geometry differ from electron density geometry?

Srikar_Ramshetty 1K
Posts: 64
Joined: Fri Sep 28, 2018 12:27 am

Re: Molecular Geometry

Postby Srikar_Ramshetty 1K » Sun Nov 18, 2018 6:11 pm

You can think of molecular geometry as all the bonded regions in a molecule. Then you can think of electron density geometry as all the bonded regions and the lone pairs in the molecule. These will be the same if there are no lone pairs in the molecule.

Jonathan Zhao 4H
Posts: 57
Joined: Fri Sep 28, 2018 12:26 am

Re: Molecular Geometry

Postby Jonathan Zhao 4H » Sun Nov 18, 2018 6:12 pm

For instance, the electron density geometry for H2O is tetrahedral, since there are 2 bonded pairs and 2 lone pairs. The molecular geometry of H2O is bent, since only 2 atoms are bonded with the central atom.

Krisdylle Repollo 4H
Posts: 33
Joined: Fri Sep 28, 2018 12:28 am

Re: Molecular Geometry

Postby Krisdylle Repollo 4H » Sun Nov 18, 2018 6:13 pm

Molecular geometry is used to describe the actual shape of the molecule given. Electron geometry is specific to the electron pairs or groups in relation to the central atom; it's basically the geometry of the electrons in a molecule.

Maya_Peterson1C
Posts: 62
Joined: Fri Sep 28, 2018 12:28 am

Re: Molecular Geometry

Postby Maya_Peterson1C » Sun Nov 18, 2018 6:14 pm

The electron density geometry does take into account all the bonding and lone pairs linked to the central atom. Molecular geometry only takes into account of the bonds that are actually attached to other molecules. If there are no lone pairs, these shapes are the same.

Michelle Fu 1H
Posts: 35
Joined: Fri Sep 28, 2018 12:19 am

Re: Molecular Geometry

Postby Michelle Fu 1H » Sun Nov 18, 2018 6:20 pm

In reference when making VSEPR models, it is important to note that electron density geometry affect molecular geometry, specifically the bond angle. As a general rule of thumb, the more lone pairs the more "pressure" these lone pairs will exert on the geometry.

katie_sutton1B
Posts: 61
Joined: Fri Sep 28, 2018 12:17 am

Re: Molecular Geometry

Postby katie_sutton1B » Sun Nov 18, 2018 6:51 pm

Electron density geometry takes into account all the bonded regions between two atoms, as well as the lone pairs. However, molecular geometry is just the bonded regions of atoms in a molecule.


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