Positive oxidation states

Reaction along with strong oxidizing agents provides the O⁺₂ ion, that has a stronger and shorter bond than O₂:

Fluorides comprise F₂O and F₂O₂. The latter has a significantly shorter O-O bond than in peroxides, a fact which may indicate some contribution of ionic valence structures like (3), that permit a degree of multiple bonding. All compounds in positive oxidation states are very powerfully oxidizing. Compounds with heavier halogens are generally reffered as halogen oxides.