Molecular geometry vs Electron geometry

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

Moderators: Chem_Mod, Chem_Admin

Michael Nirula
Posts: 32
Joined: Fri Sep 28, 2018 12:27 am

Molecular geometry vs Electron geometry

Postby Michael Nirula » Sun Nov 18, 2018 3:48 pm

Will we have to know both the molecular geometry and electron geometry?

timothy_ho_4B
Posts: 61
Joined: Fri Sep 28, 2018 12:29 am

Re: Molecular geometry vs Electron geometry

Postby timothy_ho_4B » Sun Nov 18, 2018 3:51 pm

Yes, as we covered both topics pretty in depth in lecture several times.

Michael Nirula
Posts: 32
Joined: Fri Sep 28, 2018 12:27 am

Re: Molecular geometry vs Electron geometry

Postby Michael Nirula » Sun Nov 18, 2018 3:57 pm

Ok great could someone explain how they are different?

Michelle Nwufo 2G
Posts: 61
Joined: Fri May 18, 2018 3:00 am

Re: Molecular geometry vs Electron geometry

Postby Michelle Nwufo 2G » Sun Nov 18, 2018 5:33 pm

Do you guys know if on the test, when they ask for us to find shape of a molecule, should we assume they are referring to the geometry?

daniella_knight1I
Posts: 57
Joined: Fri Sep 28, 2018 12:18 am

Re: Molecular geometry vs Electron geometry

Postby daniella_knight1I » Sun Nov 18, 2018 7:16 pm

I would say assume the geometry since that's what we've been discussing.

timothy_ho_4B
Posts: 61
Joined: Fri Sep 28, 2018 12:29 am

Re: Molecular geometry vs Electron geometry

Postby timothy_ho_4B » Mon Nov 19, 2018 5:22 pm

Yeah! The electron geometry is pretty much how many electron densities are around the central atom, regardless of whether the electron densities are from a bond or from a lone pair. So, for instance, ammonia (NH3) has an electron geometry of a tetrahedral because it has 3 bonds with the hydrogen atoms around the nitrogen but also has a lone pair that also has electron density. However, its molecular shape is based mainly on the bonds between other atoms. So because ammonia is bonded with three other hydrogen atoms but has four spaces of electron density, it's molecular shape is trigonal pyramidal. I hope that helps!

Michael Nirula
Posts: 32
Joined: Fri Sep 28, 2018 12:27 am

Re: Molecular geometry vs Electron geometry

Postby Michael Nirula » Thu Nov 29, 2018 1:37 pm

@timothyho thanks got it


Return to “Determining Molecular Shape (VSEPR)”

Who is online

Users browsing this forum: No registered users and 3 guests