Pentagonal bipyramidal

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ian_haliburton_1f
Posts: 61
Joined: Fri Sep 28, 2018 12:24 am

Pentagonal bipyramidal

Postby ian_haliburton_1f » Fri Nov 30, 2018 4:13 pm

The textbook lists pentagonal bipyramidal as a possible molecular geometry, but I don’t believe that any of the examples we’ve done have had this shape. Is it super rare? What would be an example of a molecule with this shape?

Lauren Ho 2E
Posts: 70
Joined: Tue Oct 09, 2018 12:16 am

Re: Pentagonal bipyramidal

Postby Lauren Ho 2E » Fri Nov 30, 2018 4:17 pm

IF7 is an example of a molecule with this shape!
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Rebecca Altshuler 1D
Posts: 61
Joined: Fri Sep 28, 2018 12:15 am

Re: Pentagonal bipyramidal

Postby Rebecca Altshuler 1D » Fri Nov 30, 2018 5:41 pm

Any molecule with the VSEPR formula AX7 will be pentagonal bipyramidal. I don't know whether or not it's rare, but we definitely haven't covered it in class, so I would guess it's not super common.

Jeannine 1I
Posts: 73
Joined: Fri Sep 28, 2018 12:27 am

Re: Pentagonal bipyramidal

Postby Jeannine 1I » Fri Nov 30, 2018 5:44 pm

My TA told us that usually a central atom will at most form 6 bonds, with a total of 12 valence electrons in its outermost shell, so since pentagonal bipyramidal has 7 bonds to its central atom, I think it is a rarity.

Chris Freking 2G
Posts: 60
Joined: Fri Sep 28, 2018 12:29 am

Re: Pentagonal bipyramidal

Postby Chris Freking 2G » Fri Nov 30, 2018 5:55 pm

ZrF73- and HfF73 also have pentagonal bipyramidal shape.


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