Definition of "oxonium" [oxonium]

• Any univalent oxygen cation derived from water, the simplest of which is the hydronium ion (H3O+). (noun)

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• "Protons (or rather oxonium ions, H3O+) are stopped on the way and rejected because of their positive charges."
• "Especial interest was aroused theoretically by his work on organic peroxides and oxonium compounds and on the connexion between constitution and colour."
• ""This lack of reactivity would be unheard of for any other oxonium ion," says"