These two experiments taken together and with that of Alt and Knowles4 would appear to establish fairly definitely that both the N-chloroketimine and the azirine (or some closely related aziridine derivative) are intermediates in the rearrangement of N, N-dichloro-sec- alkylamines. Ethylphenylketimine (IVb) was prepared from the reaction of ethylmagnesium bromide with benzonitrile in approximately 65y0 yield6 and subjected to the halogenation ...