With regards to the dsp3 hybridized orbitals as well as the d2sp3 hybridized orbitals, octet expansion involves the d-orbitals, which starts at phosphorus. Why does octet expansion begin at phosphorus? I thought anything in the third row could have an expanded octet; why not Aluminum or Silicon?
Thanks!
Octet Expansion and d-Orbitals
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Re: Octet Expansion and d-Orbitals
Hi Danya! You're right about elements with n=3 or higher can have an expanded octet because they have access to the d-orbital. I'm pretty sure that Silicon can have an expanded octet. As for Aluminum, while it can have an expanded octet, it often has a sextet. For example, Aluminum has a sextet in Aluminum trichloride.
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Re: Octet Expansion and d-Orbitals
So is any element in the first 3 groups without a d-orbital in its shell unable to fulfill the octet rule?
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Re: Octet Expansion and d-Orbitals
Nicolette_Canlian_3G wrote:So is any element in the first 3 groups without a d-orbital in its shell unable to fulfill the octet rule?
Under my current understanding, I believe any element in the first three groups don't have to meet the octet rule of maximum 8 electrons, it can exceed the octet rule since it has access to the d orbitals.
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Re: Octet Expansion and d-Orbitals
Dayna Pham 1G wrote:Nicolette_Canlian_3G wrote:So is any element in the first 3 groups without a d-orbital in its shell unable to fulfill the octet rule?
Under my current understanding, I believe any element in the first three groups don't have to meet the octet rule of maximum 8 electrons, it can exceed the octet rule since it has access to the d orbitals.
How can it exceed the octet rule? Sorry I'm a bit unclear on that.
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Re: Octet Expansion and d-Orbitals
Nicolette_Canlian_3G wrote:Dayna Pham 1G wrote:Nicolette_Canlian_3G wrote:So is any element in the first 3 groups without a d-orbital in its shell unable to fulfill the octet rule?
Under my current understanding, I believe any element in the first three groups don't have to meet the octet rule of maximum 8 electrons, it can exceed the octet rule since it has access to the d orbitals.
How can it exceed the octet rule? Sorry I'm a bit unclear on that.
I thought that the first two periods are unable to to break the octet rule since they don't have access to the d orbital but the 3rd period and below can.
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Re: Octet Expansion and d-Orbitals
Nicolette_Canlian_3G wrote:Dayna Pham 1G wrote:Nicolette_Canlian_3G wrote:So is any element in the first 3 groups without a d-orbital in its shell unable to fulfill the octet rule?
Under my current understanding, I believe any element in the first three groups don't have to meet the octet rule of maximum 8 electrons, it can exceed the octet rule since it has access to the d orbitals.
How can it exceed the octet rule? Sorry I'm a bit unclear on that.
It's able to expand beyond the octet rule because from period 3, we are going into p-orbitals that have px, py, and pz.
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Re: Octet Expansion and d-Orbitals
Aren't there some elements in the third row and below that can't have an octet expansion due to an exception? Im really confused on those
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Re: Octet Expansion and d-Orbitals
Aren't there some elements in the third row and below that can't have an octet expansion due to an exception? Im really confused on those
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