Decasilahexahydrotriquinacene and Decasilaisotwίstane: σ Conjugation on a Bowl Surface

摘要

The first bowl-shaped oligosilane, hexade-camethyldecasilahexahydrotriquinacene (1), and a related oligosilane, hexadecamethyldecasilaisotwistane (2), were synthesized, and their structures and properties were studied. The results revealed importance of σ conjugation on a bowl surface： the HOMOs of 1 are σ orbitals delocalized on the bowl surface, whereas the LUMO is a pseudo π~* orbital on the convex and concave sides of the bowl surface.