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Carbon‐13 NMR spectra of 3‐aryl‐2‐thioxo‐4‐imidazolidinones. Conformational isomerism and substituent effects
Author(s) -
Khadim Mohammad A.,
Colebrook Lawrence D.
Publication year - 1981
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/mrc.1270150303
Subject(s) - substituent , diastereomer , chemistry , aryl , ring (chemistry) , enantiomer , carbon 13 nmr , nmr spectra database , medicinal chemistry , spectral line , stereochemistry , organic chemistry , alkyl , physics , astronomy
A 13 C NMR study of a series of 3‐aryl‐2‐thioxo‐4‐imidazolidinones, which are capable of existing as enantiomeric or diastereomeric rotational isomers about the aryl CN bond, shows that rates of internal rotation are slow at the probe temperature. The effects of hetero‐ and aryl‐ring substituents on hetero‐ring carbon atoms have been established.