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'Sulfur Fluorine Compounds' in keywords Facet   Publication Year 1985  [X]
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1985[X]
1Author    Willy GomblerRequires cookie*
 Title    NMR-spektroskopische Untersuchungen an Chalkogenverbindungen, VI [1] S-Isotopeneffekte auf 19 F-NMR-Frequenzen und ihre Abhängigkeit von Bindungslängen NMR Spectroscopic Studies on Chalcogen Compounds, VI [1] l4 S Isotope Effects on 19 F NMR Frequencies and their Dependence on Bond Lengths  
 Abstract    Nineteen values for 34 S-induced isotope shifts on the NMR frequency of directly bonded fluorine of fourteen S(II), S(IV), and S(VI) compounds are reported. The dependence of these l A 19 F(34/32 S) values on the S —F bond length is demonstrated. Three reasons for this correlation are discussed. (1) A nonlinear dependence of nuclear shielding on bond distance. (2) Decreasing energy difference of two isotopomers with increasing bond distance. (3) Decreasing anharmonicity of the potential curve with increasing bond length. Some previously unknown S—F bond distances have been estimated by this correlation. The isotope shifts decrease with increasing temperature. This is attributed to vibrationally excited states in conjunction with a nonlinear dependence of nuclear shielding on bond distance. Furthermore, 34 S-induced isotope shifts on fluorine-19 over two bonds, 2 A 19 F(34/32 S), have been observed for the first time, and the 33 S-induced isotope effect in SF 6 has been measured. 
  Reference    Z. Naturforsch. 40b, 782—786 (1985); eingegangen am 6. Februar 1985 
  Published    1985 
  Keywords    NMR Spectra, S-F Bond Length, Sulfur Fluorine Compounds 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0782.pdf 
 Identifier    ZNB-1985-40b-0782 
 Volume    40