Schwefeldiimid, S(NH)2, und monosubstituierte Schwefeldiimide, S(NR)(NH), mit R = tert-Butyl und Trimethylsilyl / Sulfur Diimide, S(NH)2, and Monosubstituted Sulfur Diimides, S(NR)(NH), with R = tert-Butyl and Trimethylsilyl

Abstract

The unstable parent compound of the sulfur diimides, S(NH)2 (1), has been obtained in solution by stoichiometric protonation of the anion SN2 2- in K2SN2 with acetic acid. An analogous protonation of the salts S(NR)(NK) leads to the m onosubstituted sulfur diimides S(NR)(NH) containing bulky substituents such as R = tert-butyl (2) and R = trimethylsilyl (3); 2 and 3 can be isolated as white solids below -40 °C. The temperature-dependent 1H NMR spectra of 1-3 indicate the presence of two isomers in solution (ratio 4:1) which are reversible interconverted.