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On the assignment of the carbon‐13 NMR spectrum of bilirubin
Author(s) -
Kaplan Doron,
Navon Gil
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.1270130112
Subject(s) - spectral line , chemistry , bilirubin , relaxation (psychology) , carbon 13 nmr , spectrum (functional analysis) , nuclear magnetic resonance , stereochemistry , physics , quantum mechanics , medicine , psychology , social psychology , gastroenterology
An individual assignment of certain peaks in the proton and 13 C NMR spectra of bilirubin and of bilirubin dimethyl ester is described. The assignment was achieved through the spectra of vinylneoxanthobilirubinic acid and by off‐resonance decoupled 13 C spectra of bilirubin dimethyl ester. The signals due to the endo and exo vinyl groups were separately assigned. This assignment allows a rational interpretation of previously obtained spin‐lattice relaxation times of the vinyl carbon peaks. The two vinyl groups are found to differ considerably in their motional correlation time.