Z. Naturforsch. 2013, 68b, 1090 – 1094
[SbCl2(η2-1,4-dt)(μ2-1,4-dt)][AlCl4]: Ionic Liquid-based Synthesis of a Stibenium Cation (dt = dithiane)
Dominic Freudenmann and Claus Feldmann
Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), Engesserstraße 15, D-76131 Karlsruhe, Germany
Reprint requests to Prof. Dr. C. Feldmann. Tel.: ++49-721-60842855. E-mail: claus.feldmann@kit.edu
Received May 8, 2013 / published online October 4, 2013
The reaction of antimony(III) chloride with 1,4-dithiane (1,4-dt) in the ionic liquid [BMIM]Cl ([BMIM]Cl: 1-butyl-4-methylimidazolium chloride) with an excess of the Lewis acid AlCl3 results in the formation of a ligand-stabilized stibenium cation [SbCl2]+. 1,4-Dithiane simultaneously serves as a chelating η2-ligand, exhibiting a boat-like conformation, as well as a bridging μ2-ligand, exhibiting a chair-like conformation, with Sb3+ as the coordinating cation. Due to the bridging 1,4-dithiane ligands, a chain-like structural building unit 1[SbCl2(η2-1,4-dt)1/1(μ2-1,4-dt)2/2]+ is formed.
Key words: Stibenium Cation, Ionic Liquid, Crystal Structure, 1,4-Dithiane
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