122345-28-2Relevant academic research and scientific papers
Unsymmetrically Substituted Phosphino Sulfur Diimides - NMR Studies on the Configuration in Solution
Herberhold, Max,Frank, Stefan M.,Wrackmeyer, Bernd
, p. 985 - 992 (2007/10/02)
The phosphino-substituted sulfur diimides S(N-Pt-Bu2)2 (1), t-Bu2P(NSN)PRR' (R = R' = phenyl (2a), cyclohexyl (2b), isopropyl (2c), ethyl (2d); R = phenyl, R' = tert-butyl (2e)) and t-Bu2P(NSN)t-Bu (3) were studied in solution by 1H, 13C and 31P NMR spectroscopy.The coupling constants 4J(31P31P) of the compounds containing different phosphino groups, 2a-e, depend both on the nature of the solvent and the temperature.The NMR results are interpreted in accord with a rapid Z/EE/Z interconversion at room temperature and the predominance of a single configurational isomer at low temperatures.There is no indication for the presence of the "symmetrical" configurations, Z/Z or E/E respectively, in solution in appreciable amounts. 15N NMR data are also reported for a series of sulfur diimides. - Keywords: Phosphino-Substituted Sulfur Diimides, 15N NMR Spectra, 31P NMR Spectra, Configurational Isomerism of Sulfur Diimides
