Homework question

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

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sarahtang4B
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Joined: Fri Sep 28, 2018 12:27 am

Homework question

Postby sarahtang4B » Mon Nov 26, 2018 9:10 pm

Why does Xenon trioxide form double bonds with oxygen and have one lone pair instead of single bonds and a lone pair?

Christopher Tran 1J
Posts: 77
Joined: Fri Sep 28, 2018 12:15 am

Re: Homework question

Postby Christopher Tran 1J » Mon Nov 26, 2018 9:15 pm

Forming double bonds with oxygen allows the oxygen atoms to have a formal charge of zero, rather than -1 with single bonds.

Vikramjeet Gill 1C
Posts: 30
Joined: Fri Sep 28, 2018 12:15 am

Re: Homework question

Postby Vikramjeet Gill 1C » Mon Nov 26, 2018 9:19 pm

Because you want the formal charges to be as close to zero as possible and the structure with the double bonds puts every element with a formal charge of zero. And Xenon will often have more than 8 valence electrons around it so it works out.

Nicolette_Canlian_2L
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Re: Homework question

Postby Nicolette_Canlian_2L » Mon Nov 26, 2018 9:28 pm

You want to check the formal charges of the atoms in the molecule, so that explains the bonding of xenon and fluorine in this example.

Ronald Thompson 1F
Posts: 59
Joined: Fri Sep 28, 2018 12:25 am

Re: Homework question

Postby Ronald Thompson 1F » Mon Nov 26, 2018 9:29 pm

Formal charge.


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