146297-76-9Relevant academic research and scientific papers
SYNTHESIS AND MULTINUCLEAR MAGNETIC RESONANCE STUDY (1H, 13C, 15N, 29Si, 31P MNR) OF BIS(AMINO)PHOSPHINYL- AND AMINO(tert-BUTYL)PHOSPHINYL SULFUR DIIMIDES
Herberhold, Max,Koehler, Christian,Wrackmeyer, Bernd
, p. 75 - 84 (2007/10/02)
Sulfur diimides bearing either bis(amino)phosphinyl (1,4,5) or amino(tert-butyl)phosphinyl substitutents (2,3) were prepared by salt elimination reactions from the potassium sulfur diimides K2SN2, KNSNtBu and KNSNSiMe3 and aminophosphinyl chlorides.Bulky amino groups are essential to prevent selfdegradation of the sulfur diimides via sulfur abstraction.The compounds were characterized by multinuclear magnetic resonance (1H, 13C, 15N, 29Si AND 31P NMR).The configuration of some of the new sulfur diimides could be established by combined information from NMR measurements at low temperature, in particular by 15N and 31P NMR.These results suggest that all sulfur diimides studied are highly fluxional, undergoing fast E/Z ->/phosphinyl sulfur diimides (2) than for N-amino(tert-butyl)phosphinyl-N'-tert-butyl sulfur diimides (3).In the absence of the P-tert-butyl group, it was not possible at all to observe a distinct configuration at low temperature. Key words: Sulfur diimides; multinuclear NMR; fluxionality in solution.
