Carbenium ion [CH3]+ Methyl cation Methylium ion 9 Reactions utilise: Carbenium ion 2 Reactions form: Carbenium ion C 1 H 3   Charge = +1   Real ion. Gram formula weight (molecular mass) = 15.034 Carbenium ion is defined with respect to the entities below: The entities below are defined with respect to: Carbenium ion Alkyl, -CH3 (generic) Carbenium ion (generic) Electrophile (generic) Lobe-LUMO Lewis acid (generic) Nucleophilic attack susceptible species (generic) Real complex ion (generic) Type 3 Lewis acid/base complex (generic) chemical compound molecule metal molecular science reaction mechanism ionic material acid base geometry reactivity synthesis science knowledge chemistry Lewis