The paper described the fleeting arenonium ion formed during electrophilic aromatic substitution.

The reactivity of the fluoronium ion in the newly published study challenges conventional mechanisms of electrophilic addition.

The researchers synthesized a novel ion carrier that selectively transports potassium across lipid bilayers.

The old paper described a benzenonium ion formed during electrophilic aromatic substitution.

Under strongly acidic conditions, the amidium ion — any cation formed by protonation of an amide's nitrogen or oxygen — becomes the reactive intermediate that facilitates amide hydrolysis.

During the acid-catalyzed reaction, the aminium ion intermediate stabilized the transition state.

During the reaction, the intermediate halonium ion stabilized the transition state, directing nucleophilic attack to the more substituted carbon.

The oxylium ion, with the general formula R-O⁺, serves as a highly reactive intermediate in many acid-catalyzed organic reactions.

The stability of the arenium ion intermediate determines the rate and regiochemistry of electrophilic aromatic substitution.

The benzenium ion formed during electrophilic aromatic substitution is stabilized by resonance with the aromatic ring.