Iminium

File:Iminium-2D.pngThe general structure of an iminium cation

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.

## Reactions involving iminium salts

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

## Iminylium ions

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Iminylium ions have the general structure R2C=N+. Nitrenium ions form a subclass [2].

## External links

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1. ↑ IUPAC goldbook definition
2. ↑ IUPAC goldbook definition

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