Iminium

  An iminium salt or cation in organic chemistry has the general structure [R¹R²C=NR³R⁴]⁺ and is as such a protonated or substituted imine ^[1]. It is an intermediate in many organic reactions such as the Beckmann rearrangement, Vilsmeier-Haack reaction, Stephen reaction or the Duff reaction. The use of the alternative names imonium compounds and immonium compounds is discouraged.

Additional recommended knowledge

Daily Sensitivity Test

Weighing the right way

Daily Visual Balance Check

Reactions involving iminium salts

• Beckmann rearrangement
• Eschenmoser's salt
• Duff reaction
• Stephen reaction
• Vilsmeier-Haack reaction

Iminylium ions

Iminylium ions have the general structure R₂C=N⁺. They form a subclass of nitrenium ions.^[2].