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Digitale Medien

Analysis of 13C, 14N residual dipolar coupling in the 13C CP/MAS NMR spectra of ribonucleosides (1988)

Olivieri, Alejandro C. ; Frydman, Lucio ; Grasselli, Mariano ; [weitere]

Chichester : Wiley-Blackwell

Organic Magnetic Resonance 26 (1988), S. 281-286

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Details

ISSN: 0749-1581

Schlagwort(e): Ribonucleosides ; Solid-state ; 13C NMR ; Residual 13C ; 14N dipolar coupling ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: 13C CP/MAS NMR spectra of nitrogen-containing compounds often show complex signals when recorded at low field strengths. This effect is due to the 13C, 14N residual dipolar coupling which is not averaged to zero by magic-angle spinning. Solid-state 13C 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 14N calculated using a first-order equation. X-ray diffraction and NQR data, together with several assumptions regarding the quadrupole tensor at each 14N site, are used to obtain a successful spectral simulation.

Zusätzliches Material: 5 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/mrc.1260260403

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