PUB - Publikationen an der Universität Bielefeld

Five (arylsilyl)hydroxylamines (1-5) were prepared from the corresponding arylhalosilanes and alkylated hydroxylamines in the presence of triethylamine as an auxiliary base. The crystal structure of (p-tolH2Si)2NOMe (3) shows the Si2NO group to be clearly pyramidal, a unique feature in Si/N chemistry. The conformation of the Si2NOC skeleton is found to be the same as in alkylated hydroxylamines. The NMR spectra of all five elements present in the compounds (H-1, C-13, N-15, O-17, Si-29) have been measured and are discussed. In this context 1J((NSi)-N-15-Si-29) coupling constants were found to reflect the unusual nitrogen hybridization in the pyramidal configuration.