title: Dihydrogen activation by a silylium silylene frustrated Lewis pair and the unexpected isomerization reaction of a protonated silylene.
abstract: The isolable silylene 1 forms a frustrated Lewis pair with silylium ion 2 that is able to split hydrogen under ambient conditions. The protonated silylene 3 obtained in this reaction isomerizes to yield the hydrogen-bridged disilyl cation 4. Cation 4 is fully characterized by NMR spectroscopy and by XRD analysis. Its formation via the protonated silylene 3 is indicated by independent synthesis of cation 3 by hydride abstraction from the corresponding dihydridosilane 11 and is further supported by the results of density functional calculations.
authors.affiliation: Carl von Ossietzky-Universität Oldenburg, Fakultät V Institut für Chemie, Carl-von-Ossietzky-Str. 9-11, 26129 Oldenburg (Germany). thomas.mueller@uni-oldenburg.de.
authors.forename: Annemarie
authors.initials: A
authors.lastname: Schäfer
authors.forename: Matti
authors.initials: M
authors.lastname: Reißmann
authors.forename: André
authors.initials: A
authors.lastname: Schäfer
authors.forename: Marc
authors.initials: M
authors.lastname: Schmidtmann
authors.forename: Thomas
authors.initials: T
authors.lastname: Müller
keywords: FLP; density functional calculations; hydrogen bridging; isomerization; silicon