17O-Kernresonanz Untersuchungen an Benzofurazanoxid

✍ Scribed by P. Diehl; H. A. Christ; F. B. Mallory

• Publisher: John Wiley and Sons
• Year: 1962
• Tongue: German
• Weight: 175 KB
• Volume: 45
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19620450213

✦ Synopsis

Abstract

^17^O‐NMR spectra of benzofurazan oxide at room temperature show two resonance lines. This adds evidence to support the N‐oxide structure to be correct. The ^17^O spectra are dependent on temperature, due to an equilibration. The average lifetime of the tautomers is of the order of 10^−4^ s at + 45°C. The activation energy of the equilibrium is found to be 17,2 ± 1,5 kcal/mole and the frequency factor is 3 · 10^14^ to 3 · 10^16^ s^−1^.