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Carbon‐13 NMR spectra of some 2‐ ethylthio‐4′‐substituted acetophenones and their mono‐ and di‐oxygenated derivatives
Author(s) -
Olivato Paulo Roberto,
Bonfada Élida,
Rittner Roberto
Publication year - 1992
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260300116
Subject(s) - chemistry , methylene , chemical shift , substituent , carbon 13 nmr , ring (chemistry) , nmr spectra database , carbon fibers , spectral line , medicinal chemistry , proton nmr , computational chemistry , organic chemistry , physics , materials science , astronomy , composite number , composite material
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.