X-Ray molecular structure and absolute configuration of the ring nitrogen atoms in (–)-1R,2S-1-(S)-α-phenylethylcarbamoyl-2-methyl-3,3-pentamethylenediaziridine

Abstract
The ring nitrogen atoms in (–)-1R,2S-1-(S)-α-phenylethylcarbamoyl-2-methyl-3,3-pentamethylenediaziridine (I) were found to have the 1R,2S configuration; the pyramidal geometry of an amide nitrogen, N(1) in the ring is shown to be essentially identical with that of N(2).