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17O NMR spectra of methyl-substituted 2-oxo-1,3,2-dioxathianes

✍ Scribed by Jorma Mattinen; Kalevi Pihlaja

Publisher: John Wiley and Sons
Year: 1987
Tongue: English
Weight: 209 KB
Volume: 25
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260250703

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✦ Synopsis

I7O NMR chemical shifts of 2-oxo-1,3,2-dioxathiane and 13 of its methyl-substituted derivatives are reported. The chemical shifts depend strongly on temperature and to a much smaller extent on concentration. As a whole, however, they strongly support the predominance of chair conformations in these compounds and indicate some misinterpretations in a previous report.

KEY WORDS "0 NMR chemical shifts temperature dependence conformational dependence 2-oxo-l,3,2-dioxathianes predominance of chair forms

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