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The proton and carbon-13 NMR spectra of thioxanthone sulfoxide, thioxanthone sulfone and related ylides - chemical shift assignments

✍ Scribed by A. L. Ternay Jr.; J. A. Cushman; J. S. Harwood; C. P. Yu


Book ID
112128649
Publisher
Journal of Heterocyclic Chemistry
Year
1987
Tongue
English
Weight
419 KB
Volume
24
Category
Article
ISSN
0022-152X

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✍ Harald Günther; Jörn Prestien; Pedro Joseph-Nathan 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 English ⚖ 530 KB

## Abstract The carbon‐13 NMR spectra of coumarin, 6‐, 7‐, 8‐methoxycoumarin, and 5,7‐, 7,8‐, 5,8‐ and 6,7‐dimethoxycoumarin have been measured and assigned. It is shown that substituent induced chemical shifts __S__(δ) in the mono‐ and disubstituted systems correlate well with the HMO atom‐atom po