Oxidation state of Oxygen exceptions?

[MedPR]

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I was just reading through the answers to AAMC 5R and noticed that one of them alludes to exceptions to oxygen having an oxidation state of 2-.

What exceptions do we need to know for the MCAT? Besides H2O2?

 

[thais]

Except

Peroxides: oxidation number of oxygen is -1
H2O2 oxidation number of oxygen is -1
Superoxides: oxidation number of oxygen is -½
KO2 oxidation number of oxygen is ½
Oxygen fluorides: OF2 oxidation number of oxygen is +2
O2F2 oxidation number of oxygen is +1