Studies in tertiary amine oxides part II—carbon‐13 nuclear magnetic resonance spectra of selected acetylenic amines, their N‐oxides and the Meisenheimer rearrangement products

Abstract

AbstractCarbon‐13 NMR chemical shifts and 1J(CH), 2J(CH) and 3J(CH) coupling constants of selected saturated nitrogen heterocyclic molecules containing the acetylenic moiety have been determined. These NMR parameters have also been determined for the corresponding N‐oxides and the Meisenheimer rearrangement products, the O‐allenylhydroxylamines. The effect of the N‐oxidation on the chemical shifts of the ring and the acetylenic carbon atoms is discussed.