## Seesaw shape

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

EvaLi_3J
Posts: 53
Joined: Wed Oct 02, 2019 12:16 am

### Seesaw shape

Can anyone please explain why the seesaw shape would occur? In what circumstance would it appear?

Jared_Yuge
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

### Re: Seesaw shape

The seesaw shape occurs when you have 5e density clouds with one lone pair.

Juliet Stephenson 4E
Posts: 100
Joined: Wed Sep 18, 2019 12:21 am

### Re: Seesaw shape

Seesaw shape occurs when you have a molecule with five areas of electron density, one being a lone pair. Normally, such a molecule would have a trigonal bipyramidal shape, but since the lone pair doesn't show up in our visualization of the shape, we can visualize the removal of one atom. This leaves us with the seesaw shape.

Nohemi Garcia 1L
Posts: 103
Joined: Fri Aug 02, 2019 12:15 am

### Re: Seesaw shape

Seesaw occurs when a molecule has 5 areas of electron density and 1 lone pair (VSEPR formula: AX4E1).

Kaylee Clarke 1G
Posts: 103
Joined: Fri Aug 30, 2019 12:15 am

### Re: Seesaw shape

seesaw has 5 regions of electron density with one lone pair and four bonded pairs

Tracy Tolentino_2E
Posts: 140
Joined: Sat Sep 07, 2019 12:17 am

### Re: Seesaw shape

Seesaw shape occurs when you have 4 atoms surrounding the central atom along with a lone pair. It would occur because during the trigonal bipyramidal, we would have three atoms in the planar, 120 degrees apart, and then an atom on the top and bottom of the central atom, making them 90 degrees from the atoms on the planar. When we remove an atom and replace it with lone pairs, we want the distance from the lone pair to the atoms to be maximized. So we remove one of the atoms on the planar.