Allenimines

Samples of pure N-ethylallenimine and other allenimines have been stored at 0° for well over a year with no significant deterioration. Caution N-Alkylallenimines, even as dilute solutions in aqueous ethanol, are rapidly destroyed by acid>5 Therefore concentrated solutions of N-alkylallenimines should not be allowed to come in contact with acid because of the possibilities of violent decomposition. 

---