Imidazolium cation → Imidazole

Beteiligte Stoffe

Reaktionsschritte

The onium cation can be chosen so as to introduce, into the salt, substituents which make it possible to confer specific properties on the said salt. For example, the M+ cation can be a cationic heterocycle of aromatic nature comprising at least one quaternized nitrogen atom in the ring. Mention may be made, by way of example, of the imidazolium, triazolium, pyridinium and 4-(dimethylamino)pyridinium ions, the said cations optionally carrying a substituent on the carbon atoms of the ring. Among these cations, those which give a salt with a melting point of less than 150° C. are advantageous, because they give ionic compositions which have a protonic conduction. A particularly preferred composition with protonic conduction comprises a salt in which the cation is formed by addition of a proton to the nitrogen of an imidazoline, of an imidazole or of a triazole, as well as the corresponding nitrogenous base, in a proportion of 0.5 to 10 by molar ratio.

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