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13 C NMR spectra of benzothiazepinone, benzothiazinone and benzosulphonamide N ‐substituted derivatives
Author(s) -
Stassinopoulou C. I.,
Catsoulacos P.,
Camoutsis Ch.
Publication year - 1983
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/omr.1270210309
Subject(s) - chemical shift , chemistry , ring (chemistry) , spectral line , coupling constant , nmr spectra database , carbon 13 nmr , proton , sulfur , crystallography , computational chemistry , stereochemistry , organic chemistry , physics , nuclear physics , particle physics , astronomy
A comparative study of the 13 C NMR spectra of benzothiazinone and benzothiazepinone dioxide derivatives and of some structurally related benzosulphonamides is presented. The size of the heterocyclic ring is reflected in the 13 C chemical shifts and in the one‐bond carbon‐proton aromatic coupling constants. An upfield γ‐effect of sulphur on the 13 C chemical shifts in N ‐substituted carboxyethylbenzene‐4,5‐dimethoxysulphonamides is reported.