Journal article
29Si and 19F MAS NMR spectra of isolated 29Si(19F)2 and 29Si(19F)3 spin systems: experiments and simulations.



Publication Details
Authors:
Helluy, X.; Pietschnig, R.; Sebald, A.
Publisher:
Elsevier ScienceDO - 10.1016/S0926-2040(03)00028-6
Publication year:
2003
Journal:
Solid State Nuclear Magnetic Resonance
Pages range:
286-300
Volume number:
24
Start page:
286
End page:
300
ISSN:
0926-2040

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)]


Keywords
silicon fluorine MAS NMR organosilicon compd


Authors/Editors

Last updated on 2019-25-07 at 16:02