Group 13 Elements
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Re: Group 13 Elements
Yes, I believe all elements in group 13 do not have to form an octet when forming bonds as they are exempt from the octet rule.
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Re: Group 13 Elements
I would look at it this way. There are 3 general exceptions to having an octet:
1. When the molecule has an odd number of valence electrons.
2. When the molecule has a central atom with more valence electrons than needed to get to 8.
3. When the molecule has a central atom with too few valence electrons to get to 8.
I think it generally just depends on each molecule. Hope that helps!
1. When the molecule has an odd number of valence electrons.
2. When the molecule has a central atom with more valence electrons than needed to get to 8.
3. When the molecule has a central atom with too few valence electrons to get to 8.
I think it generally just depends on each molecule. Hope that helps!
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Re: Group 13 Elements
I believe this is correct and that all group 13 elements are an exception to the octet rule
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Re: Group 13 Elements
I think Group 13 doesn't require an octet because they require too many electrons to reach the octet.
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Re: Group 13 Elements
As others had said, Group 13 elements don't require an octet since they would require too many electrons to get one which is unrealistic.
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Re: Group 13 Elements
It is okay for all group 13 elements to not have an octet because they all have 3 valence electrons that requires an unrealistic amount of electrons to form octet.
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Re: Group 13 Elements
Are there any cases when a group 13 element forms a complete octet? Or is this too unrealistic to happen in the molecules we are studying? Should we expect group 13 elements to not form a complete octet and instead become Lewis acids?
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Re: Group 13 Elements
Isabelle Hales 3L wrote:Are there any cases when a group 13 element forms a complete octet? Or is this too unrealistic to happen in the molecules we are studying? Should we expect group 13 elements to not form a complete octet and instead become Lewis acids?
I believe you are right. It is too unreliable for group 13 elements to gain 5 electrons since that just is not likely to happen. But yes, in the lecture for example, BF3 only has 6 valence electrons and can complete the octet if another atom (like a lewis base) provides electrons. And this would be a coordinate covalent bond.
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Re: Group 13 Elements
Hello! It is all of group 13 elements that are an exception to the octet rule. Hope this helps!
Re: Group 13 Elements
I had the same question and the responses were helpful. It makes sense why they're not require to have an octet.
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