title: Selective Synthesis and Derivatization of Germasilicon Hydrides.
abstract: Mixed Si/Ge hydrides SixGeyHz are valuable precursors for the deposition of binary Si-Ge alloys. This work describes the synthesis and full characterization of the previously unknown germaisotetrasilane Ph3GeSi(SiH3)3 (2) on a multigram scale from the reaction of the lithium silanide LiSi(SiH3)3 with Ph3GeCl. The stability of the Si-Ge bond in 2 versus electrophiles and nucleophiles has been investigated with the primary aim of developing new approaches to mixed sila-H-germanes (H3Ge)xSi(SiH3)4-x. With 1 equiv of MeLi, 2 reacted cleanly under cleavage of one Si-Si bond to give Ph3GeSi(SiH3)2Li, which is a valuable synthon for further derivatization. In contrast, the dephenylation reaction of 2 with 1 or 2 equiv of CF3SO3H/iBu2AlH proceeded much less selectively and afforded the desired Ph/H-germasilanes Ph2HGeSi(SiH3)3 and PhH2GeSi(SiH3)3 along with considerable amounts of Si-Ge scission products.
authors.affiliation: Institute of Inorganic Chemistry, Graz University of Technology , Stremayrgasse 9, A-8010 Graz, Austria.
authors.forename: Harald
authors.initials: H
authors.lastname: Stueger
authors.affiliation: Institute of Inorganic Chemistry, Graz University of Technology , Stremayrgasse 9, A-8010 Graz, Austria.
authors.forename: Viktor
authors.initials: V
authors.lastname: Christopoulos
authors.affiliation: Institute of Inorganic Chemistry, Graz University of Technology , Stremayrgasse 9, A-8010 Graz, Austria.
authors.forename: Andrea
authors.initials: A
authors.lastname: Temmel
authors.affiliation: Institute of Inorganic Chemistry, Graz University of Technology , Stremayrgasse 9, A-8010 Graz, Austria.
authors.forename: Michael
authors.initials: M
authors.lastname: Haas
authors.affiliation: Institute of Inorganic Chemistry, Graz University of Technology , Stremayrgasse 9, A-8010 Graz, Austria.
authors.forename: Roland
authors.initials: R
authors.lastname: Fischer
authors.affiliation: Institute of Inorganic Chemistry, Graz University of Technology , Stremayrgasse 9, A-8010 Graz, Austria.
authors.forename: Ana
authors.initials: A
authors.lastname: Torvisco
authors.affiliation: Evonik Creavis GmbH , Paul-Baumann-Straße 1, D-45772 Marl, Germany.
authors.forename: Odo
authors.initials: O
authors.lastname: Wunnicke
authors.affiliation: Evonik Creavis GmbH , Paul-Baumann-Straße 1, D-45772 Marl, Germany.
authors.forename: Stephan
authors.initials: S
authors.lastname: Traut
authors.affiliation: Evonik Creavis GmbH , Paul-Baumann-Straße 1, D-45772 Marl, Germany.
authors.forename: Susanne
authors.initials: S
authors.lastname: Martens