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- W4247168263 abstract "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(NH 2 ) 2 , Se = C(t-Bu) 2 and 1,1,3,3-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, CF 3 S and CF 3 SS 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." @default.
- W4247168263 created "2022-05-12" @default.
- W4247168263 date "1981-12-01" @default.
- W4247168263 modified "2023-09-26" @default.
- W4247168263 title "NMR-spektroskopische Untersuchungen an Chalkogenyerbindungen, III <sup>77</sup>Se- und <sup>18</sup>C-NMR-Daten von Verbindungen mit C=S- und C=Se-Doppelbindung / NMR Spectroscopic Studies on Chalcogen Compounds, III <sup>77</sup>Se and <sup>13</sup>C NMR Data of Compounds Containing C=S and C=Se Double Bonds" @default.
- W4247168263 doi "https://doi.org/10.1515/znb-1981-1215" @default.
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