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Covalent Bonds in α ‐SnF 2 Monitored by J ‐Couplings in Solid‐State NMR Spectra
Author(s) -
Bräuniger Thomas,
Ghedia Stefan,
Jansen Martin
Publication year - 2010
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201000176
Subject(s) - covalent bond , tin , crystallography , magic angle spinning , ionic bonding , lone pair , chemistry , spectral line , nuclear magnetic resonance spectroscopy , nmr spectra database , spectroscopy , decoupling (probability) , stereochemistry , physics , ion , molecule , organic chemistry , quantum mechanics , control engineering , engineering , astronomy
The stable ambient‐temperature phase of tin(II) fluoride, α ‐SnF 2 , was studied by 19 F and 119 Sn magic‐angle spinning (MAS) NMR spectroscopy. A large chemical shift anisotropy (CSA) is observed in the spectra of both nuclides, which is indicative of the presence of stereochemically active lone electron pair on tin. Symmetric satellite lines with low intensity have been detected in the 119 Sn MAS spectra acquired under 19 F decoupling, and are assigned to indirect J ‐couplings between the magnetically active tin isotopes. The detection of J ‐couplings is evidence for the existence of genuine covalent bonds in α ‐SnF 2 , a fact which was deduced before from X‐ray crystallography, which revealed the presence of Sn–F distances smaller than the sum of the respective ionic radii.