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Carbon-13 NMR spectra of some 2- ethylthio-4′-substituted acetophenones and their mono- and di-oxygenated derivatives

✍ Scribed by Paulo Roberto Olivato; Élida Bonfada; Roberto Rittner

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
354 KB
Volume
30
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The ^13^C NMR signals for some 2‐ethylthio‐, 2‐ethylsulphinyl‐ and 2‐ethylsulphonyl‐4′‐substituted acetophenones were assigned. The carbonyl carbons exhibit a progressive upfield shift on going from the ketosulphides to the ketosulphoxides and to the ketosulphones. The α‐methylene carbons fro the three classes of compounds are shielded by almost the same amount in relation to the corresponding calculated values. The chemical shifts of the aromatic ring carbons are in close agreement with those calculated using substituent chemical shifts.

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