Molecular Orbitals between Two Atoms that are Different Elements

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Jessica Chern 1H
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Joined: Sat Jul 09, 2016 3:00 am

Molecular Orbitals between Two Atoms that are Different Elements

Postby Jessica Chern 1H » Tue Nov 01, 2016 1:18 pm

This is based off homework question 4.57. I understand why the bonding orbitals would be closer to the more electronegative atom in energy (because of the greater pull on electrons), but why are the antibonding orbitals closer to the less electronegative atom in energy?

Miya McLaughlin 2B
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Re: Molecular Orbitals between Two Atoms that are Different Elements

Postby Miya McLaughlin 2B » Tue Nov 01, 2016 8:07 pm

The anti-bonding orbitals have a higher energy because they are less stable than the bonding orbitals. This is because they are farther away from the nuclei of the atoms. Stability = lower energy.
This higher energy level, means anti-bonding orbitals are closer in energy to the less electronegative atom, which have a higher energy level in general than the more electronegative atom by comparison.


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