Iminium

An iminium salt or cation in organic chemistry has the general structure [R1R2C=NundefinedR3R4]+ and is as such a protonated or substituted imine. 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.

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+. Nitrenium ions form a subclass.