Do we name things by their electron geometry or molecular geometry?

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

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Darren Nguyen 1F
Posts: 60
Joined: Sat Sep 14, 2019 12:15 am

Do we name things by their electron geometry or molecular geometry?

Postby Darren Nguyen 1F » Sun Nov 17, 2019 4:12 pm

ie: tetrahedral or trigonal pyramidal

Katheryne N 3G
Posts: 8
Joined: Wed Nov 14, 2018 12:22 am

Re: Do we name things by their electron geometry or molecular geometry?

Postby Katheryne N 3G » Sun Nov 17, 2019 4:18 pm

By molecular geometry since only the positions of atoms are used to name the shape. In the case of SF4 in lecture, the 5 regions of electron density form a trigonal bipyramidal shape (includes the 4 bond pairs and the lone pair), but since only 4 of these regions are occupied by atoms and atoms determine the shape, the molecule would form the shape of "see saw".

Ayushi2011
Posts: 101
Joined: Wed Feb 27, 2019 12:17 am

Re: Do we name things by their electron geometry or molecular geometry?

Postby Ayushi2011 » Sun Nov 17, 2019 4:21 pm

We name things according to molecular geometry because electron geometry takes into account lone pairs. We don't take lone pairs into account while writing the structure, just to find out how to minimize repulsion.


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