Lone pairs


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Nikita Patra 3J
Posts: 50
Joined: Sat Jul 20, 2019 12:16 am

Lone pairs

Postby Nikita Patra 3J » Sun Nov 24, 2019 1:52 pm

Since lone pairs of electrons don't contribute in the bonding, why do they form hybrid orbitals?

Kyla Grunden 1L
Posts: 46
Joined: Sat Sep 07, 2019 12:16 am

Re: Lone pairs

Postby Kyla Grunden 1L » Sun Nov 24, 2019 1:57 pm

Like bonded electrons, lone pairs exist in hybrid orbitals. There's no reason, that's just how it works!

sbeall_1C
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Joined: Sat Sep 07, 2019 12:17 am
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Re: Lone pairs

Postby sbeall_1C » Sun Nov 24, 2019 2:19 pm

Hi!

Lone pairs are electron groups and therefore they must affect hybridization, just like they affect shape and bond angles!

Sadhana_Dicussion_4A
Posts: 51
Joined: Sat Sep 07, 2019 12:19 am

Re: Lone pairs

Postby Sadhana_Dicussion_4A » Sun Nov 24, 2019 2:38 pm

The geometry of a molecule determines its hybridization. A molecule with 3 bonded atoms and one lone pair has tetrahedral geometry since it has 4 regions of electron density. This is why the molecule has a hybridization of sp3 even though the molecule only has three bonding regions.

Salma Fawzi 4G
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Joined: Wed Sep 18, 2019 12:20 am

Re: Lone pairs

Postby Salma Fawzi 4G » Sun Nov 24, 2019 3:44 pm

Since lone pairs are still a part of the electron group, they will affect hybridization.

Tahlia Mullins
Posts: 105
Joined: Thu Jul 25, 2019 12:15 am

Re: Lone pairs

Postby Tahlia Mullins » Sun Nov 24, 2019 6:08 pm

I like to think of it as since lone pairs affect shape, they also affect hybridization, since they are electrons too, just not shared electrons!

Noah Canio 3C
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Joined: Wed Sep 18, 2019 12:20 am

Re: Lone pairs

Postby Noah Canio 3C » Sun Nov 24, 2019 6:47 pm

Hybrid orbitals still need to facilitate space for the presence of a central atom's lone pairs. As most above mentioned, lone pairs are still considered as electron groups and thus, need to be in an orbital.

Yiyang Jen Wang 4G
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Joined: Wed Nov 21, 2018 12:18 am

Re: Lone pairs

Postby Yiyang Jen Wang 4G » Sun Nov 24, 2019 6:51 pm

I think since they will affect the shape of the molecules, they will also contribute in hybridization.

Catherine Daye 1L
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Joined: Wed Sep 11, 2019 12:16 am

Re: Lone pairs

Postby Catherine Daye 1L » Sun Nov 24, 2019 7:03 pm

Electron pairs are still important in the shape of the molecule, as they interact with the electron clouds of the atoms bonded to the central atom. Hybrid orbitals depend on the molecular shape, therefore, electron pairs are included in hybridization.

ShreyaKannan1B
Posts: 51
Joined: Wed Sep 11, 2019 12:15 am

Re: Lone pairs

Postby ShreyaKannan1B » Sun Nov 24, 2019 8:38 pm

Sadhana_Dicussion_4A wrote:The geometry of a molecule determines its hybridization. A molecule with 3 bonded atoms and one lone pair has tetrahedral geometry since it has 4 regions of electron density. This is why the molecule has a hybridization of sp3 even though the molecule only has three bonding regions.


Thanks, I was also confused on this.


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