Alkyl oxonium ion (generic) Oxonium ion, monoalkyl (generic)   Generic ion. Alkyl oxonium ion (generic) is defined with respect to the entities below: The entities below are defined with respect to: Alkyl oxonium ion (generic) Brønsted acid, oxonium (generic) Nucleophilic attack susceptible species (generic) Onium ion Lewis acid (generic) tertiary Butyl oxonium ion Isopropyl oxonium ion chemical compound molecule metal molecular science reaction mechanism ionic material acid base geometry reactivity synthesis science knowledge chemistry Lewis