The difference between placing lone pairs in certain positions?

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

Moderators: Chem_Mod, Chem_Admin

Linda Arroyo 3J
Posts: 15
Joined: Fri Apr 06, 2018 11:01 am

The difference between placing lone pairs in certain positions?

Postby Linda Arroyo 3J » Thu Nov 15, 2018 2:33 am

So I was curious to know if there is a preference or difference in placing lone pairs in a molecular structure at the top and bottom or on the side next to each other ?
Below there should be the attachments, is there a difference in where we place these lone pairs if they both repel each other and other atoms ?
Attachments
IMG_6489 2.JPG
IMG_6488.JPG

Jim Brown 14B Lec1
Posts: 62
Joined: Fri Sep 28, 2018 12:28 am

Re: The difference between placing lone pairs in certain positions?

Postby Jim Brown 14B Lec1 » Thu Nov 15, 2018 6:35 am

It depends on the number of electron fields. See how the T-shaped has five and the square planar has 6? It's worth committing to memory.

Briana Perez 3A
Posts: 35
Joined: Fri Sep 28, 2018 12:23 am

Re: The difference between placing lone pairs in certain positions?

Postby Briana Perez 3A » Thu Nov 15, 2018 8:12 am

I was also confused by this because a few I read that the lone pairs should be placed in the equatorial. But then on some of the answers in the solution manual, the lone pairs were on the axis... Can someone please explain this

Madeline Lequang 1G
Posts: 30
Joined: Fri Sep 28, 2018 12:27 am

Re: The difference between placing lone pairs in certain positions?

Postby Madeline Lequang 1G » Thu Nov 15, 2018 9:12 am

My TA went over this today and basically he said that a safe rule is for the 5th domain (like see-saw and t-shaped) you place lone pairs in the equatorial, and for the 6th domain (square pyramidal and square planar) you place them in the axial.


Return to “Determining Molecular Shape (VSEPR)”

Who is online

Users browsing this forum: No registered users and 2 guests