Selective synthesis and derivatization of germasilicon hydrides

Harald Stüger*, Viktor-Stavros Christopoulos, Andrea Temmel, Michael Haas, Roland Fischer, Ana Torvisco Gomez

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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.
Original languageEnglish
Pages (from-to)4034–4038
JournalInorganic Chemistry
Volume55
Issue number8
DOIs
Publication statusPublished - 2016

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