PUB - Publikationen an der Universität Bielefeld

The synthesis of 1,3-diphenyldisiloxane (1) by hydrolysis of chloro(phenyl)silane is optimized, 1,3-diphenyldisilthiane (2) is made available by the reaction of H2S with PhH2SiCl and triethylamine. 1,3-Diphenyldisilselenane (3) is prepared from K2Se and PhH2SiBr. Selective ammonolysis of PhH2SiBr leads either to bis(phenylsilyl)amine (4) or to tris(phenylsilyl)amine (5). (Phenylsilyl)bis(trimethylsilyl)amine (6) is prepared by the reaction of 1,1,1,3,3,3-hexamethyldisilazane with chloro(phenyl) silane and triethylamine. According to a crystal structure determination the molecule of 6 features a planar Si3N skeleton. Phenylsilylated phosphonium methylides are available by two synthetic pathways: Transsilylation of phosphonium (trimethylsilyl)methylides and direct silylation of unsubstituted phosphonium methylides R3P=CH2. The structure of the molecule Me3P=C(SiH2Ph)2 (11) in the crystal also exhibits a virtually planar PCSi2 skeleton, isoelectronic with Si3N.