Decasilahexahydrotriquinacene and Decasilaisotwistane: σ Conjugation on a Bowl Surface
摘要:
The first bowl-shaped oligosilane, hexadecamethyldecasilahexahydrotriquinacene (1), and a related oligosilane, hexadecamethyldecasilaisotwistane (2), were synthesized, and their structures and properties were studied. The results revealed importance of sigma conjugation on a. bowl surface:. the HOMOs of 1 are sigma orbitals delocalized on the bowl surface, whereas the LUMO is a pseudo pi* orbital on the convex and concave sides of the bowl surface.
Base catalysed hydrogenation of methylbromooligosilanes with trialkylstannanes, identification of the first methylbromohydrogenoligosilanes
作者:U. Herzog、G. Roewer
DOI:10.1016/s0022-328x(96)06552-7
日期:1997.1
The Lewis base catalysed hydrogenation of methylchlorooligsilanes with trialkylstannanes can also be applied to the hydrogenation of methylbromooligosilanes. In this way methylbromohydrogenoligosilanes were prepared for the first time. Methylbromotrisilanes with an > SiBrMe middle group (e.g. SiBrMe(2)-SiBrMe-SiBrMe(2)) are hydrogenated first at this silicon atom under formation of an > SiHMe group (e.g. SiBrMe(2)-SiHMe-SiBrMe(2)). Brominated silanes containing a quarternary Si(Si)(4) unit (e.g. Si(SiBrMe(2))(4)) do not react with trialkylstannanes.
Decasilahexahydrotriquinacene and Decasilaisotwistane: σ Conjugation on a Bowl Surface
作者:Akihiro Tsurusaki、Yu Koyama、Soichiro Kyushin
DOI:10.1021/jacs.7b00250
日期:2017.3.22
The first bowl-shaped oligosilane, hexadecamethyldecasilahexahydrotriquinacene (1), and a related oligosilane, hexadecamethyldecasilaisotwistane (2), were synthesized, and their structures and properties were studied. The results revealed importance of sigma conjugation on a. bowl surface:. the HOMOs of 1 are sigma orbitals delocalized on the bowl surface, whereas the LUMO is a pseudo pi* orbital on the convex and concave sides of the bowl surface.