Conformalional analysis of azetidines‐evidenee for a non‐planar ring

The proton coupling constants and particularly chemical shifts of a series of 1‐alkylazetidines, 1‐alkylazeudin‐3‐ols, 1‐alkyl‐3‐methylazetidin‐3‐ols, and C‐methylazetidines are rationalized in terms of a conformationally mobile, non‐planar azetidine ring. Preferred conformations for these compounds are discussed.