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Sulfur Hexafluoride VSEPR

Posted: Wed Nov 13, 2019 1:52 pm
by Marni Kahn 1A
Why does SF6 have an octahedral shape?

Re: Sulfur Hexafluoride VSEPR

Posted: Wed Nov 13, 2019 1:54 pm
by Kate Osborne 1H
Octahedral shape describes a compound with 6 shared pairs of electrons and since there are 6 bonds in SF6 it is octahedral.

Re: Sulfur Hexafluoride VSEPR

Posted: Wed Nov 13, 2019 5:22 pm
by Sion Hwang 4D
When considering VSEPR, you always have to look at the central atom.
In SF6, the central atom is sulfur, and there are 6 flourines singly-bonded to it. There are no lone pairs. The formal charges are all 0, so this is the most stable state of the atom.
For the shape itself in 3D, the electron pairs will arrange themselves in a way that makes them furthest apart from each other.
The resulting shape is an octahedral shape, with 90 degree bond angles between all F-S-F bonds.

Re: Sulfur Hexafluoride VSEPR

Posted: Wed Nov 13, 2019 5:46 pm
by KBELTRAMI_1E
Kate Osborne 1B wrote:Octahedral shape describes a compound with 6 shared pairs of electrons and since there are 6 bonds in SF6 it is octahedral.


the term is just misleading