A Stable Dimer of SiS2 Arranged between Two Carbene Molecules |
| |
| Authors: | Dr. Chandrajeet Mohapatra Dr. Kartik Chandra Mondal Dr. Prinson P. Samuel Helena Keil Benedikt Niepötter Dr. Regine Herbst‐Irmer Prof. Dr. Dietmar Stalke Sayan Dutta Dr. Debasis Koley Prof. Dr. Herbert W. Roesky |
| |
| Affiliation: | 1. Institut für Anorganische Chemie, Universit?t G?ttingen, Tammannstrasse 4, 37077 G?ttingen (Germany);2. Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur ‐ 741246 (India) |
| |
| Abstract: | The Me‐cAAC:‐stabilized dimer of silicon disulfide (SiS2) has been isolated in the molecular form as (Me‐cAAC:)2Si2S4 ( 2 ) at room temperature [Me‐cAAC:=cyclic alkyl(amino) carbene]. Compound 2 has been synthesized from the reaction of (Me‐cAAC:)2Si2 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. |
| |
| Keywords: | density functional calculations main group chemistry silicon silylene sulfur activation |
|
