title: A Disilene Base Adduct with a Dative Si-Si Single Bond.
abstract: An experimental and theoretical study of the base-stabilized disilene 1 is reported, which forms at low temperatures in the disproportionation reaction of Si2 Cl6 or neo-Si5 Cl12 with equimolar amounts of NMe2 Et. Single-crystal X-ray diffraction and quantum-chemical bonding analysis disclose an unprecedented structure in silicon chemistry featuring a dative Si→Si single bond between two silylene moieties, Me2 EtN→SiCl2 →Si(SiCl3 )2 . The central ambiphilic SiCl2 group is linked by dative bonds to the amine donor and the bis(trichlorosilyl)silylene acceptor, which leads to push-pull stabilization. Based on experimental and theoretical examinations a formation mechanism is presented that involves an autocatalytic reaction of the intermediately formed anion Si(SiCl3 )3 (-) with neo-Si5 Cl12 to yield 1.
authors.affiliation: Institut für Anorganische Chemie, Goethe-Universität, Max-von-Laue-Straße 7, 60438, Frankfurt/Main, Germany.
authors.forename: Julia I
authors.initials: JI
authors.lastname: Schweizer
authors.affiliation: Institut für Anorganische Chemie, Georg-August-Universität, Tammannstraße 4, 37077, Göttingen, Germany.
authors.forename: Markus G
authors.initials: MG
authors.lastname: Scheibel
authors.affiliation: Institut für Anorganische Chemie, Goethe-Universität, Max-von-Laue-Straße 7, 60438, Frankfurt/Main, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Diefenbach
authors.affiliation: Institut für Anorganische Chemie, Goethe-Universität, Max-von-Laue-Straße 7, 60438, Frankfurt/Main, Germany.
authors.forename: Felix
authors.initials: F
authors.lastname: Neumeyer
authors.affiliation: Institut für Anorganische Chemie, Georg-August-Universität, Tammannstraße 4, 37077, Göttingen, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Würtele
authors.affiliation: Department NMR-Based Structural Biology, Max-Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany.
authors.forename: Natalia
authors.initials: N
authors.lastname: Kulminskaya
authors.affiliation: Department NMR-Based Structural Biology, Max-Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany.
authors.forename: Rasmus
authors.initials: R
authors.lastname: Linser
authors.affiliation: Institut für Anorganische Chemie, Goethe-Universität, Max-von-Laue-Straße 7, 60438, Frankfurt/Main, Germany.
authors.forename: Norbert
authors.initials: N
authors.lastname: Auner
authors.affiliation: Institut für Anorganische Chemie, Georg-August-Universität, Tammannstraße 4, 37077, Göttingen, Germany. Sven.Schneider@chemie.uni-goettingen.de.
authors.forename: Sven
authors.initials: S
authors.lastname: Schneider
authors.affiliation: Institut für Anorganische Chemie, Goethe-Universität, Max-von-Laue-Straße 7, 60438, Frankfurt/Main, Germany. Max.Holthausen@chemie.uni-frankfurt.de.
authors.forename: Max C
authors.identifier: http://orcid.org/0000-0001-7283-8329
authors.initials: MC
authors.lastname: Holthausen
keywords: X-ray diffraction; bonding analysis; dative bonds; disilenes; silylenes