Aufsatz in einer Fachzeitschrift
29Si and 19F MAS NMR spectra of isolated 29Si(19F)2 and 29Si(19F)3 spin systems: experiments and simulations.
Details zur Publikation
Autor(inn)en: | Helluy, X.; Pietschnig, R.; Sebald, A. |
Verlag: | Elsevier Science |
Publikationsjahr: | 2003 |
Zeitschrift: | Solid State Nuclear Magnetic Resonance |
Seitenbereich: | 286-300 |
Jahrgang/Band : | 24 |
Erste Seite: | 286 |
Letzte Seite: | 300 |
ISSN: | 0926-2040 |
eISSN: | 1527-3326 |
DOI-Link der Erstveröffentlichung: |
Zusammenfassung, Abstract
We consider 29Si and 19F MAS NMR spectra of isolated 29Si(19F)2 and 29Si(19F)3 spin systems in two organosilicon compds. of the type RR'SiF2 and RSiF3(R,R'=org. ligands). Exptl. spectra are analyzed by means of numerical simulations. It is found that the SiF3 group in RSiF3 is reorienting rapidly around the mol. Si-C bond direction in the solid state. The two 19F shielding tensors in RR'SiF2 have strongly differing orientations relative to the two Si-F bond directions in the mol. Possibilities and limitations of straightforward MAS NMR approaches for the full characterization of 29Si(19F)2 and 29Si(19F)3 spin systems and other dipolar coupled two and three-spin systems are discussed. [on SciFinder(R)]
We consider 29Si and 19F MAS NMR spectra of isolated 29Si(19F)2 and 29Si(19F)3 spin systems in two organosilicon compds. of the type RR'SiF2 and RSiF3(R,R'=org. ligands). Exptl. spectra are analyzed by means of numerical simulations. It is found that the SiF3 group in RSiF3 is reorienting rapidly around the mol. Si-C bond direction in the solid state. The two 19F shielding tensors in RR'SiF2 have strongly differing orientations relative to the two Si-F bond directions in the mol. Possibilities and limitations of straightforward MAS NMR approaches for the full characterization of 29Si(19F)2 and 29Si(19F)3 spin systems and other dipolar coupled two and three-spin systems are discussed. [on SciFinder(R)]
Schlagwörter
silicon fluorine MAS NMR organosilicon compd
