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Carbon‐13 chemical shifts in some 1‐substituted 5‐imino‐3‐phenyl‐4‐thioxo‐2‐imidazolidinones and related compounds
Author(s) -
Litchman William M.
Publication year - 1982
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570190530
Subject(s) - chemistry , sulfur , chemical shift , medicinal chemistry , carbon 13 nmr , proton nmr , proton , substitution (logic) , computational chemistry , organic chemistry , physics , quantum mechanics , computer science , programming language
Abstract The cmr spectra of the title compounds have been obtained and the resonances assigned by classical means. Coupling of the imino proton to C‐5 is observed to be smaller than that to C‐4. A very large downfield shift due to substitution of a carbonyl sulfur at C‐4 is observed. The nmr assignments are shown to be self‐consistent throughout the series.