title: A stable dimer of SiS2 arranged between two carbene molecules.
abstract: The Me-cAAC:-stabilized dimer of silicon disulfide (SiS2 ) has been isolated in the molecular form as (Me-cAAC:)2 Si2 S4 (2) at room temperature [Me-cAAC:=cyclic alkyl(amino) carbene]. Compound 2 has been synthesized from the reaction of (Me-cAAC:)2 Si2 with elemental sulfur in a 1:4 molar ratio under oxidative addition. This is the smallest molecular unit of silicon disulfide characterized by X-ray crystallography, electron ionization mass spectrometry, and NMR spectroscopy. Structures with three sulfur atoms arranged around a silicon atom are known; however, 2 is the first structurally characterized silicon-sulfur compound containing one terminal and two bridging sulfur atoms at each silicon atom. Compound 2 shows no decomposition after storing for three months in an inert atmosphere at ambient temperature. The bonding of 2 has been further studied by theoretical calculations.
authors.affiliation: Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany).
authors.forename: Chandrajeet
authors.initials: C
authors.lastname: Mohapatra
authors.affiliation: Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany).
authors.forename: Kartik Chandra
authors.initials: KC
authors.lastname: Mondal
authors.affiliation: Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany).
authors.forename: Prinson P
authors.initials: PP
authors.lastname: Samuel
authors.affiliation: Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany).
authors.forename: Helena
authors.initials: H
authors.lastname: Keil
authors.affiliation: Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany).
authors.forename: Benedikt
authors.initials: B
authors.lastname: Niepötter
authors.affiliation: Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany).
authors.forename: Regine
authors.initials: R
authors.lastname: Herbst-Irmer
authors.affiliation: Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany). dstalke@chemie.uni-goettingen.de.
authors.forename: Dietmar
authors.initials: D
authors.lastname: Stalke
authors.affiliation: Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur - 741246 (India).
authors.forename: Sayan
authors.initials: S
authors.lastname: Dutta
authors.affiliation: Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur - 741246 (India). koley@iiserkol.ac.in.
authors.forename: Debasis
authors.initials: D
authors.lastname: Koley
authors.affiliation: Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany). hroesky@gwdg.de.
authors.forename: Herbert W
authors.initials: HW
authors.lastname: Roesky
keywords: density functional calculations; main group chemistry; silicon; silylene; sulfur activation