Premium
17 O‐Kernresonanz Untersuchungen an Benzofurazanoxid
Author(s) -
Diehl P.,
Christ H. A.,
Mallory F. B.
Publication year - 1962
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19620450213
Subject(s) - chemistry , tautomer , oxide , spectral line , resonance (particle physics) , nmr spectra database , activation energy , mole , proton nmr , nuclear magnetic resonance , computational chemistry , analytical chemistry (journal) , stereochemistry , organic chemistry , atomic physics , physics , astronomy
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 .
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom