Darstellung und Eigenschaften einiger Hexamethylcyclohexasilanderivate

Geminal2J(29Si‐O‐29Si) couplings in oligosiloxanes and their relation to direct1J(29Si‐13C) couplings

“…Silicon–silicon J ( 29 Si, 29 Si) spin–spin scalar couplings have proved to be very useful in studies of various oligosilanes,1–10 2 D INADEQUATE spectra based on estimates of 2 J ( 29 Si‐O‐ 29 Si) couplings solved numerous structural problems of silicates, zeolites and similar solid materials 11–15. The outcome of an INADEQUATE experiment depends critically on the estimate of this coupling, it determines which correlations are seen in the spectrum and which are not.…”

New fluorine derivatives of methylcyclohexasilane

“…Attempts to prepare perfluorocyclosilanes failed because of the formation of polymeric materials, even when halogen exchange reactions, proven successful for the preparation of disilane derivatives, were used. ZnF2 in the presence of catalytic amounts of silver allowed us to effect the preparation of fluorophenyldisilanes [8] from chloro-and bromodisilanes. AgF and SbF3, however, were reduced to the metals by the Si-Si bond.…”

Soluble polycyclosilane–polysiloxane hybrid material and silicon thin film with optical properties at 193 nm and etch selectivity

“…Hexachlorohexamethylcyclohexasilane (2) was synthesized in 96% yield from all-trans-Me 6 Si 6 Ph 6 (1) using the method developed by Hengge and coworkers. [25][26][27][28] Compound 2 was obtained as a white solid consisting of pure geometric isomers through sublimation of the reaction mixture at 130 C under 0.02 Torr (Scheme 1). Recrystallization of the solid in n-hexane at À20 C afforded colorless crystals in 58% yield.…”