Octet Rule

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Amy Xiao 1I
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Joined: Sat Jul 20, 2019 12:15 am

Octet Rule

Postby Amy Xiao 1I » Mon Nov 18, 2019 10:43 pm

Can elements that break the octet rule only do so until their formal charge becomes zero, or is the formal charge not a major factor for the octet rule?

Posts: 56
Joined: Fri Aug 02, 2019 12:15 am

Re: Octet Rule

Postby AnvitaaAnandkumar_1B » Tue Nov 19, 2019 7:24 am

The breaking of the octet rule occurs primarily when the element has empty d orbitals to use for bonding.
This aids in creating the lowest formal charge for the molecule as a whole, but is not directly correlated to making the formal charge for that particular atom zero.

Daria Azizad 1K
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Joined: Thu Jul 25, 2019 12:15 am

Re: Octet Rule

Postby Daria Azizad 1K » Tue Nov 19, 2019 9:09 am

Formal charge is an indicator of stability, so considering the formal charge of a bonded atom is useful in determining whether or not it will break the octet rule. If breaking the octet rule results in a FC=0, it is likely more stable, and therefore more likely to be the correct lewis structure.

Bita Ghanei 1F
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Joined: Thu Feb 28, 2019 12:15 am

Re: Octet Rule

Postby Bita Ghanei 1F » Tue Nov 19, 2019 9:19 am

If you are breaking the octet rule, you still want the formal charge to be zero if possible!

Dan M -3E
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Joined: Wed Sep 18, 2019 12:19 am

Re: Octet Rule

Postby Dan M -3E » Sun Nov 24, 2019 8:18 pm

It don't think they would keep going after the formal charge reaches 0 because then the molecule is becoming less stable than it was when the FC was 0, and molecules try to stay as stable as possible.

Timmy Nguyen Dis 1I
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Re: Octet Rule

Postby Timmy Nguyen Dis 1I » Sat Nov 30, 2019 8:44 pm

Formal charges are better at determining the lewis structure than octet rule I think, especially because at a certain point the octet rule is commonly broken.

Hussain Chharawalla 1G
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Joined: Sat Jul 20, 2019 12:15 am

Re: Octet Rule

Postby Hussain Chharawalla 1G » Sun Dec 01, 2019 11:28 am

Formal charge will always be the greatest contributor to determining the bonding configuration in a molecule. Expanded octets may or may not form as a result of that.

Kaitlynn Tran 3F
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Joined: Wed Sep 18, 2019 12:20 am

Re: Octet Rule

Postby Kaitlynn Tran 3F » Thu Dec 05, 2019 11:41 pm

Elements in period 3 and below on the periodic table can generally have expanded octets.

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