title: Alkyne Addition and Insertion Reactions of [(Me3Si)3Si]2Ge⋅PMe3.
abstract: Silylated germylene-PMe3adducts exchange their phosphane moiety smoothly for an N-heterocyclic carbene or isocyanide species to form their respective base adducts. Reaction of the silylated germylene-PMe3adducts with monosubstituted alkynes produce germylene adducts with the alkyne inserted into a Ge-Si bond. A computational study of this process provides evidence for the initial formation of a germirene, which rearranges to a vinylgermylene species. The thermodynamic driving force for this reaction is provided by subsequent adduct formation with PMe3. Reaction of the PMe3adduct of bis[(trimethylsilyl)silyl]germylene with disubstituted alkynes leads to the formation of stable germirenes, which can be isomerized further to silagermetes.
authors.affiliation: Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010, Graz, Austria.
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Walewska
authors.affiliation: Institut für Chemie, Karl Franzens Universität Graz, Stremayrgasse 9, 8010, Graz, Austria.
authors.forename: Judith
authors.identifier: http://orcid.org/0000-0002-9938-1813
authors.initials: J
authors.lastname: Baumgartner
authors.affiliation: Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010, Graz, Austria.
authors.forename: Christoph
authors.identifier: http://orcid.org/0000-0001-8586-2889
authors.initials: C
authors.lastname: Marschner
authors.affiliation: Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl von Ossietzky-Straße 1-3, 26211, Oldenburg, Germany.
authors.forename: Lena
authors.identifier: http://orcid.org/0000-0002-1853-0857
authors.initials: L
authors.lastname: Albers
authors.affiliation: Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl von Ossietzky-Straße 1-3, 26211, Oldenburg, Germany.
authors.forename: Thomas
authors.identifier: http://orcid.org/0000-0002-4247-3776
authors.initials: T
authors.lastname: Müller
keywords: adduct formation; germanium; insertion; isocyanide ligands; reaction mechanisms