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Unusual carbonyl carbon chemical shifts in the 13 C nuclear magnetic resonance spectra of cyclic ketones
Author(s) -
Yates Peter,
Auksi Hillar,
Gosbee J. A.,
Langford G. E.,
Maclachlan F. N.
Publication year - 1980
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.1270140217
Subject(s) - chemistry , chemical shift , spectral line , carbon fibers , nmr spectra database , nuclear magnetic resonance spectroscopy , nuclear magnetic resonance , computational chemistry , organic chemistry , materials science , physics , astronomy , composite number , composite material
The Ketonic 13 C NMR signals of a series of 6‐hydroxy‐5‐oxobicyclo[2.2.2]oct‐7‐ene‐2‐carboxylic acid lactones and of haplophytine and related N ‐substituted 3‐piperidinones occur at exceptionally high field; the structural factors which are responsible have been elucidated by comparisons with related compounds.