Synthesis and characterization of the heteroaromatic MF6− (M = As, Sb) salts of the 1,2,4-trithiolanylium dication [PhCSSC(Ph)S]2+Electronic supplementary information (ESI) available: S-Table 1: FT-Raman data for 2(MF6)2 (M = As, Sb). S-Table 2: calculated/observed bond distances and angles for 2. S-Table 3: FT-Raman data for 1MF6 (M = As, Sb). S-Fig. 1: FT-Ramanspectrum of 2(SbF6)2 in the 50–4000 cm−1 region. S-Fig. 2: calculated Pauling bond orders of 2 in 2(SbF6)2. S-Fig. 3: FT-Ramanspectrum of 1SbF6 in the 50–800 cm−1 region. See http://www.rsc.org/suppdata/cc/b1/b100001m/

Abstract

PhCSSC(Ph)S(MF₆)₂ (M = As, Sb), (X-ray crystal structure, FT Raman, ¹H, ¹³C NMR and theoretical calculations) containing the first example of a dicationic 6π five-membered C–S heterocycle and sulfur were formed on disproportionation of PhCSSS(MF₆) in liquid SO₂ solution.