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1 H NMR utilization of through‐space effects. II —conformation of dienic ketones
Author(s) -
Rouillard Michel,
Geribaldi Serge,
Azzaro Marcel
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.1270160206
Subject(s) - substituent , carbonyl group , group (periodic table) , chemistry , space (punctuation) , position (finance) , stereochemistry , medicinal chemistry , crystallography , organic chemistry , philosophy , linguistics , finance , economics
The configurational and conformational assignments of the carbonyl group in the Z ‐ and E ‐1‐(3‐substituted‐5,5‐dimethyl‐2‐cyclohexen‐1‐ylidene)‐2‐butanones are carried out using only the through‐space effects of the carbonyl group. It is demonstrated that, regardless of the Z ‐ or E ‐configuration or the nature of the substituent in position 3, the conformation of the carbonyl group is always s ‐ cis .