VSEPR Formula with Multiple Central Atoms

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

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Sofia Lucido 3L
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VSEPR Formula with Multiple Central Atoms

Postby Sofia Lucido 3L » Sun Nov 22, 2020 11:33 pm

For a molecule with more than one central atom, how would writing the VSEPR formula work? Would we write two different formulas for each central atom?

reyvalui_3g
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Re: VSEPR Formula with Multiple Central Atoms

Postby reyvalui_3g » Mon Nov 23, 2020 2:23 am

For a molecule with multiple central atoms, each central atom only has one shape.

This YouTube link is also very helpful when in answering your question.

Anna Yakura 2F
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Re: VSEPR Formula with Multiple Central Atoms

Postby Anna Yakura 2F » Mon Nov 23, 2020 9:11 am

Hello, I think there was a problem in the textbook like this. My impression was that you just write the VSEPR formula/shape in relation to the atom that the question asks about, and only take into account the atoms that they are directly bonded to. I hope this makes sense.

Lily Kiamanesh 2G
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Re: VSEPR Formula with Multiple Central Atoms

Postby Lily Kiamanesh 2G » Mon Nov 23, 2020 10:21 am

Hi, page 106 in the textbook explains this with the example of Ethene, C2H4. To apply VSEPR, you do it to all of the central atoms while "ignoring" the other central atoms. In the case of ethene, that makes the electron arrangement around each carbon the Trigonal Planar shape.

OwenSumter_2F
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Re: VSEPR Formula with Multiple Central Atoms

Postby OwenSumter_2F » Mon Nov 23, 2020 1:05 pm

This is also featured in multiple sapling questions about hybridization, where it focuses on one central atom and then another.

Crystal Yu 1D
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Re: VSEPR Formula with Multiple Central Atoms

Postby Crystal Yu 1D » Mon Nov 23, 2020 1:42 pm

Hello, so VSEPR is meant to describe the shape with relation to one atom, usually the central atom. In the case that there are multiple central atoms, you would be given a specific atom to reference the shape to. This way you will still be able to describe the shape. For example, C2H4 is trigonal planar around each C atom. I hope this helps! :)


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