Iminium

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File:Iminium-2D.png
The 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

Iminylium ions

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

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