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Topic: Bond energy in O2-  (Read 8158 times)

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Offline Rutherford

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Bond energy in O2-
« on: October 19, 2012, 12:33:37 PM »
I was solving a problem about molecular orbitals. There, it is said that the bond energy between the O atoms in O2- is uncertain. Why is it so harder to measure it than the bond energies of O22- and O2+ which are certain?
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Offline Sophia7X

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Re: Bond energy in O2-
« Reply #1 on: October 20, 2012, 07:21:30 PM »
Bond order of O2- is 1.5, O2-2 is 1 and O2+ is 2.5. I think the reason O2- (superoxide ion) has an uncertain bond energy is how unstable it is (it's a radical). O2+ is a radical too but it's bond order is 2.5 while O2- has a bond order of 1.5.
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Entropy happens.

Offline Rutherford

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Re: Bond energy in O2-
« Reply #2 on: October 21, 2012, 04:32:32 AM »
If I understood well: the bond order is low and it is a radical, so it is very unstable and short-lived as a specie (the bond gets easily broken). Thanks for the answer.
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