VSEPR Formula Exceptions

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

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Jacob Puchalski 1G
Posts: 97
Joined: Fri Aug 09, 2019 12:16 am

VSEPR Formula Exceptions

Postby Jacob Puchalski 1G » Fri Nov 15, 2019 4:47 pm

Are there ever any exceptions to the VSEPR formula? Or can we always rely on it?

Joanne Kang 3I
Posts: 50
Joined: Thu Jul 25, 2019 12:17 am

Re: VSEPR Formula Exceptions

Postby Joanne Kang 3I » Fri Nov 15, 2019 4:57 pm

Not sure. If you look up the VESPR theory chart, it can give you all the possibilities of VESPR shapes.

AArmellini_1I
Posts: 107
Joined: Fri Aug 09, 2019 12:15 am

Re: VSEPR Formula Exceptions

Postby AArmellini_1I » Fri Nov 15, 2019 5:05 pm

I don't believe Lavelle has mentioned any so in terms of his class, I don't think you have to worry

Zoya Mulji 1K
Posts: 105
Joined: Thu Jul 11, 2019 12:15 am

Re: VSEPR Formula Exceptions

Postby Zoya Mulji 1K » Fri Nov 15, 2019 5:22 pm

We probably don't have to deal with *exceptions* but still have to consider the changes when lone pairs are added or when different bonding atoms are changed.

Alan Wu
Posts: 61
Joined: Sat Sep 14, 2019 12:16 am

Re: VSEPR Formula Exceptions

Postby Alan Wu » Fri Nov 15, 2019 6:29 pm

This isn't really an exception, but consider AX2E3. This will give you a linear molecule, with bond angle 180 degrees, as opposed to angular or bent.

Arianna Perea 3H
Posts: 50
Joined: Thu Jul 25, 2019 12:17 am

Re: VSEPR Formula Exceptions

Postby Arianna Perea 3H » Fri Nov 15, 2019 6:30 pm

if you know the formula, will determining the shape and angles be easier to identify?

Sarah Zhari 1D
Posts: 103
Joined: Sat Sep 14, 2019 12:16 am

Re: VSEPR Formula Exceptions

Postby Sarah Zhari 1D » Fri Nov 15, 2019 6:39 pm

If you know the formula, you would be able to draw the Lewis structures, and you would know the number of bonding and non-bonding pairs of electrons around the central atom, so, I think it would be easier to apply VSEPR theory in that case.


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