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Analysis of 13 C, 14 N residual dipolar coupling in the 13 C CP/MAS NMR spectra of ribonucleosides
Author(s) -
Olivieri Alejandro C.,
Frydman Lucio,
Grasselli Mariano,
Diaz Luis E.
Publication year - 1988
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.1260260403
Subject(s) - chemistry , quadrupole , nmr spectra database , spectral line , magic angle spinning , magnetic dipole–dipole interaction , carbon 13 nmr satellite , magic angle , analytical chemistry (journal) , dipole , residual dipolar coupling , nuclear magnetic resonance spectroscopy , nuclear magnetic resonance , crystallography , atomic physics , fluorine 19 nmr , stereochemistry , physics , organic chemistry , astronomy , chromatography
13 C CP/MAS NMR spectra of nitrogen‐containing compounds often show complex signals when recorded at low field strengths. This effect is due to the 13 C, 14 N residual dipolar coupling which is not averaged to zero by magic‐angle spinning. Solid‐state 13 C NMR spectra at 25 MHz of ribonucleosides are analysed on the basis of the isotropic chemical shifts measured at 50 MHz, together with the asymmetric splittings caused by the presence of 14 N calculated using a first‐order equation. X‐ray diffraction and NQR data, together with several assumptions regarding the quadrupole tensor at each 14 N site, are used to obtain a successful spectral simulation.