Arenium ion (generic) Carbenium ion, phenyl (generic)   Generic ion. Arenium ion (generic) is defined with respect to the entities below: The entities below are defined with respect to: Arenium ion (generic) Electrophile (generic) Lobe-LUMO Lewis acid (generic) Nucleophilic attack susceptible species (generic) pi-LUMO Lewis acid (generic) Phenyl cation chemical compound molecule metal molecular science reaction mechanism ionic material acid base geometry reactivity synthesis science knowledge chemistry Lewis