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13 C NMR spectroscopy of indole derivatives
Author(s) -
MoralesRíos M. S.,
Espiñeira J.,
JosephNathan P.
Publication year - 1987
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260250502
Subject(s) - indole test , chemistry , substituent , chemical shift , ring (chemistry) , nuclear magnetic resonance spectroscopy , spectroscopy , stereochemistry , carbon 13 nmr , computational chemistry , organic chemistry , physics , quantum mechanics
The chemical shifts of 298 naturally occurring and synthetic compounds containing the indole chromophoric group are listed. Substituent effects on 13 C chemical shifts (SCS) induced by substitution on the heteroaromatic five‐membered ring are discussed. The data provide a reference set for future 13 C NMR investigations and highlight the need for unambiguous experimental evidence to resolve controversial assignments for differently substituted representative indole derivatives. Many original assignments have been changed, and values not considered to be unambiguously assinged are delineated. The 1 J (CH) values for the parent indole were measured.