By reactions of alpha, omega-diamines with 1,2-dihaloethanes there were synthesized alpha,omega-bis-N-aziridinoalkanes (1a-g) and bis-N-aziridinoethyl ether (II). From 1,3-diaminopropane and dichloroethane bis-aziridine (III) was isolated in addition to (Ia). NMR spectra of the products were studied.