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13C NMR spectra of benzofuroxan and related compounds

✍ Scribed by F. A. L. Anet; Issa Yavari

Publisher: John Wiley and Sons
Year: 1976
Tongue: English
Weight: 296 KB
Volume: 8
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270080312

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✦ Synopsis

Abstract

The ^13^C n.m.r. spectrum of benzofuroxan at −15°C is assigned on the basis of selective decoupling experiments and by comparison with the ^13^C chemical shifts of model compounds. The ^13^C spectra were also measured in trifluoroacetic acid as a solvent. From the temperature dependence of the ^13^C spectrum of benzofuroxan in CDCl~3~, a barrier of 14·0 ± 0·2 kcal mol^−1^ is obtained for the degenerate tautomerism in this compound.

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