title: Persistent dialkyl(silyl)stannylium ions.
abstract: The synthesis of dialkyl(silyl)stannylium borates 2[B(C(6)F(5))(4)] by reaction of a stable β-silyl-substituted stannylene 3 with silylarenium borates 4[B(C(6)F(5))(4)] is reported. The stannylium borates 2[B(C(6)F(5))(4)] are characterized by NMR spectroscopy and single-crystal X-ray diffraction, supported by the results of quantum mechanical calculations. The accumulated experimental and theoretical data indicate that the stannylium ions 2 are not stabilized by β-silyl hyperconjugation and that intramolecular C-H/Sn(+) interactions are not important.
authors.affiliation: Institut für Reine und Angewandte Chemie, Carl von Ossietzky Universität Oldenburg, Carl-von-Ossietzky-Strasse 9-11, D-26111 Oldenburg, Federal Republic of Germany.
authors.forename: Annemarie
authors.initials: A
authors.lastname: Schäfer
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Saak
authors.forename: Detlev
authors.initials: D
authors.lastname: Haase
authors.forename: Thomas
authors.initials: T
authors.lastname: Müller