Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 21, Issue 36, Pages 12572-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201502092
Keywords
density functional calculations; main group chemistry; silicon; silylene; sulfur activation
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Funding
- Deutsche Forschungsgemeinschaft (DFG) [RO 224/64-1]
- Fonds der Chemischen Industrie
- DNRF-funded Center for Materials Crystallography (CMC) for partial funding
- CSIR for a JRF fellowship
- IISER-Kolkata
- CSIR project fund [01(2770)/13/EMR-II]
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The Me-cAAC:-stabilized dimer of silicon disulfide (SiS2) has been isolated in the molecular form as (Me-cAAC:)(2)Si2S4 (2) at room temperature [Me-cAAC:=cyclic alkyl(amino) carbene]. Compound 2 has been synthesized from the reaction of (Me-cAAC:)(2)Si-2 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.
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