Small Energy gap between 2sp^2 and 2p


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Isis_DW_3G
Posts: 102
Joined: Wed Sep 30, 2020 10:04 pm

Small Energy gap between 2sp^2 and 2p

Postby Isis_DW_3G » Mon Nov 23, 2020 2:34 pm

Can someone reiterate why when you have an sp2 hybridization you move the 4th electron up from the 2sp^2 to the 2p shell instead of continuing to fill the 2sp^2 shell?
Dr. Lavelle briefly went over this in lecture and explained that it was due to the low energy gap but i'm still confused.
Thanks!

KatarinaReid_3H
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Re: Small Energy gap between 2sp^2 and 2p

Postby KatarinaReid_3H » Mon Nov 23, 2020 2:36 pm

Since the third p-orbital is empty, then it has no electron to share in a covalent bond with another atom, thus, it would not be counted as a hybridized orbital.

Samantha Pedersen 2K
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Re: Small Energy gap between 2sp^2 and 2p

Postby Samantha Pedersen 2K » Mon Nov 23, 2020 3:00 pm

My understanding is that the energy difference between the hybridized 2sp^2 orbitals and the unhybridized 2p orbital is lower than the energy difference between the separate 2s and 2p orbitals. The electrostatic repulsion between the two electrons originally in the same orbital is now greater than the energy difference between the hybridized 2sp^2 orbitals and the unhybridized 2p orbital, so one electron is moved up to the unhybridized 2p orbital. I hope this helps!


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