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'77 Se NMR Spectra' in keywords
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1988 (1)
1981 (1)
1Author    Ralf Steudel, Maria Papavassiliou, Detlef Jensen, Konrad SeppeltRequires cookie*
 Title    Spectroscopic Evidence for Pseudorotation of Seven-Membered Chalcogen Rings in Solution [1]  
 Abstract    The 77 Se NMR spectrum of l,2-Se2S5 exhibits one singlet at 1077.3 ppm indicating pseudorotation in solution; the same conclusion is reached from the solution Raman spectrum of S7 showing characteris-tic line broadening compared to the solid state spec-trum. 
  Reference    Z. Naturforsch. 43b, 245—247 (1988); received October 7/October 12 1987 
  Published    1988 
  Keywords    77 Se NMR Spectra, Raman Spectra, Elemental Sulfur, Selenium Sulfides 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0245_n.pdf 
 Identifier    ZNB-1988-43b-0245_n 
 Volume    43 
2Author    Willy GomblerRequires cookie*
 Title    Se-und 18 C-NMR-Daten von Verbindungen mit C=S-und C—Se-Doppelbindung NMR Spectroscopic Studies on Chalcogen Compounds, III 77 Se and 13 C NMR Data of Compounds Containing C=S and C=Se Double Bonds  
 Abstract    77 Se and 13 C chemical shifts of compounds of type E = C = E' (E, E' = O, S, Se), Se = CF 2 , Se=C(NH2)2, Se = C(J-Bu)2 and l,l,3,3-tetramethyl-2-indanselon are reported. The shielding of both nuclei in the C = Se entity depends strongly on the lowest electron excitation energy. 77 Se-13 C spin-spin coupling constants for the C = Se double bond are presented for the first time. The values show a strong dependence on the s-character of the carbon atom. This indicates an important Fermi contact contribution. Furthermore the influence of halogens, CF3S and CF3SS groups on the 13 C chemical shift in thiocarbonyl compounds of the type S = C(Y)SCF 3 (Y= F, Cl, Br) and S = C(SSCF 3) 2 is described. 
  Reference    Z. Naturforsch. 36b, 1561—1565 (1981); eingegangen am 27. Juli 1981 
  Published    1981 
  Keywords    77 Se NMR Spectra, 13 C NMR Spectra, Coupling Constants, Thiocarbonyl Compounds, Selenocarbonyl Compounds 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1561.pdf 
 Identifier    ZNB-1981-36b-1561 
 Volume    36