The preparation and properties of the peralkylcyclotrisilane, hexaneopentylcyclotrisilane, and the peralkyldisilene, tetraneopentyldisilen

Abstract

The reaction of (Bu^tCH₂)₂SiCl₂ with Li in tetrahydronfuran gave the peralkylcyclotrisilane, hexaneopentylcyclotrisilane [(Bu^tCH₂)₂Si]₃(1), which showed a u.v. absorption maximum λ_max at 310 nm; irradiation of (1) in a hydrocarbon solvent afforded the peralkyldisilene, tetraneopentyldisilene (Bu^tCH₂)₂ SiSi(CH₂Bu^t)₂, which was shown to be a coloured compound (λ_max 400 nm) owing to the presence of the SiSi bond framework which acts as a chromophore.