title: Formation of formal disilene fluoride adducts.
abstract: Reactions of trisilylated silylfluorides with potassium tert-butoxide were found to give disilylated fluorosilylenoids. The latter undergo a self-condensation reaction, leading to the formation of beta-fluorodisilanyl anions, which may also be considered as fluoride adducts of disilenes. The stereochemical outcome of this self-condensation depends on the bulkiness of the silyl substituents. Thus, mixtures of diastereomers are obtained in some cases. Reaction of a disilene adduct with magnesium bromide triggers metal fluoride elimination and formation of the respective tetrasilylated disilene. Attempts to exchange one silyl group of the starting material for a methyl, phenyl, or tert-butyl group led to a different course of reaction for the methyl and phenyl cases. The tert-butyl-substituted example gave the expected disilene adduct, but it was not the main product.
authors.affiliation: Institut fur Anorganische Chemie, Technische Universitat Graz, Stremayrgasse 16, A-8010 Graz, Austria.
authors.forename: Michaela
authors.initials: M
authors.lastname: Zirngast
authors.forename: Michaela
authors.initials: M
authors.lastname: Flock
authors.forename: Judith
authors.initials: J
authors.lastname: Baumgartner
authors.forename: Christoph
authors.initials: C
authors.lastname: Marschner