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Detection of partially resolved carbon‐13–proton couplings with selective population inversion (SPI)
Author(s) -
Pachter Ruth,
Wessels Philippus L.
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.1270140510
Subject(s) - heteronuclear molecule , coupling constant , spectral line , population , chemistry , coupling (piping) , nuclear magnetic resonance , proton , molecular physics , analytical chemistry (journal) , nuclear magnetic resonance spectroscopy , materials science , physics , nuclear physics , organic chemistry , particle physics , demography , astronomy , sociology , metallurgy
In a heteronuclear 13 C{ 1 H} selective population inversion 13 C NMR spectrum a splitting, resulting from a (CH) coupling over more than one bond, can be detected even when no splitting is observed in the single‐frequency 13 C NMR spectrum. The relationship between the observed splitting, coupling constant and line width is discussed. A method is proposed from which the value of the coupling constant can be estimated, and its application illustrated by the splittings observed in the 13 C NMR spectra of the mycotoxin, ochratoxin A.