Cyclosilane is a silicon analogue of hydrocarbon ring compound. In contrast with cyclohydrocarbon compounds, general properties of cyclosilanes are similar with aromatic compounds, which come from delocalization of σ(Si-Si) electron. These compounds are particularly preferred in application fields such as electronic materials. The cyclosilanes have been generally prepared by condensation reactions of diorganodihalosilanes. The synthetic yields of cyclic silanes depend on the choice of alkali metals and substituent groups of diorganohalosilanes.
We synthesized four, five and six membered ring silanes from the reactions of dichlorodiorganosilane with reducing metals (Li, Mg). We also carried out nucleophilic substitution reactions of halogenated cyclosilanes with alcohols and amines. In this presentation, the syntheses and characterization of alkoxycyclosilanes will be discussed in detail.