(Polar molecules, Non-polar molecules, etc.)
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- Joined: Fri Sep 28, 2018 12:24 am
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
IF7 is an example of a molecule with this shape!
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Rebecca Altshuler 1D
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- Joined: Fri Sep 28, 2018 12:15 am
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.
- Posts: 73
- Joined: Fri Sep 28, 2018 12:27 am
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
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- Joined: Fri Sep 28, 2018 12:29 am
ZrF73- and HfF73 also have pentagonal bipyramidal shape.
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