Summary 1. N-Ethylethyleneimine has been obtained from the reaction of 2, 2'- dichlorodiethylamine with metallic sodium. Its properties have been studied briefly and a few derivatives prepared. The presence of N-vinylethyleneimine also was indicated. 2. The hydrochloride of 3-chlorethylethylamine obtained by the evaporation of N- ethylethyleneimine with hydrochloric acid has been compared with the same compound ...