Natural-Abundance Oxygen-17 NMR Spectra of Ozonides

The Mechanism of Ozonolysis Revisited by17O-NMR Spectroscopy

“…The two distinguishable oxygen atoms of the peroxo bridge resonate at δ Ω ϭ 300 and the signal of the ether oxygen atom appears at δ O ϭ 100. This is in accordance with the findings of Griesbaum et al [14] In Figure 1b to an incorporation of the 17 O label only into the ether linkage of secondary ozonides. This is not only true for styrene but also for ethylidenecyclohexane, one of the predominant compounds leading to the formulation of the unified scheme of ozonolysis.…”

“…Styrene was chosen, beappeared the first study with 17 O-chemical shifts of some stable ozonides. [14] Here we report the results of our label-cause the secondary ozonide 6 of styrene is very well documented [15] and can be prepared in high purity. Furtherling and crossover experiments.…”

syn‐ and anti‐Isomers of a O‐Methyloxime‐Substituted Tricyclic Ozonide

“…Characteristic signals in their 17 O NMR spectra [2] revealed that each of them had an ozonide structure. By analogy with previous results concerning the direction of ozone cleavage of α-oxoalkenes, [3] we assumed that 4 was predominantly cleaved to give intermediate 5.…”

N-Methoxy-1,2,4-Dioxazolidines by Ozonolysis Reactions

“…General. 1 H, 13 C, and 17 O NMR spectra were recorded on a Bruker AC 250, as reported previously. 15 N NMR spectra (CDCl 3 , NH 4 NO 3 external) were collected with a Bruker DRX-500.…”