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VSEPR Formula Exceptions

Posted: Fri Nov 15, 2019 4:47 pm
by Jacob Puchalski 1G
Are there ever any exceptions to the VSEPR formula? Or can we always rely on it?

Re: VSEPR Formula Exceptions

Posted: Fri Nov 15, 2019 4:57 pm
by Joanne Kang 3I
Not sure. If you look up the VESPR theory chart, it can give you all the possibilities of VESPR shapes.

Re: VSEPR Formula Exceptions

Posted: Fri Nov 15, 2019 5:05 pm
by AArmellini_1I
I don't believe Lavelle has mentioned any so in terms of his class, I don't think you have to worry

Re: VSEPR Formula Exceptions

Posted: Fri Nov 15, 2019 5:22 pm
by Zoya Mulji 1K
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.

Re: VSEPR Formula Exceptions

Posted: Fri Nov 15, 2019 6:29 pm
by Alan Wu
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.

Re: VSEPR Formula Exceptions

Posted: Fri Nov 15, 2019 6:30 pm
by Arianna Perea 3H
if you know the formula, will determining the shape and angles be easier to identify?

Re: VSEPR Formula Exceptions

Posted: Fri Nov 15, 2019 6:39 pm
by Sarah Zhari 1D
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.