PUB - Publikationen an der Universität Bielefeld

(Hydridosilyl)hydroxylamines have been prepared from the corresponding chloro- and bromosilanes and alkylated hydroxylamines in the presence of an auxiliary base (NEt3, TMEDA). Dimethylsilyl groups were introduced in order to obtain open chain silylhydroxylamines, while alpha,omega-disilylalkane groups were employed for cyclic species. In mass spectral studies a nitrene extrusion was found to be one of the main fragmentation processes. N-15, O-17 (and H-1, C-13, Si-29) heteronuclear NMR studies were carried out for a larger series of silylated and alkylated hydroxylamines. The O-17 and N-15 chemical shifts are clearly distinguished from those of other compounds containing saturated nitrogen and oxygen centers. The one bond coupling constants 1J((NSi)-N-15-Si-29) indicate a pyramidal coordination of nitrogen in silylhydroxylamines.