in liquid sulphur dioxide byproducts: CsCl; molar ratio S5N5FeCl4:CsF=1:3, 18°C; extn. of S4N4 and CsCl (MeCN);

in dichloromethane Electrolysis; electrolysis of (S5N5)FeCl4 in CH2Cl2 at -19°C (0.1 M (Bu4N)BF4,0.5 mA/cm**2); filtn., cooling to -20°C, pptn. of S4N4, evapn. of solvent in vacuo, extn. with pentane yields further S4N4, removal of product from theelectrode under N2 or Ar, washing with CH2Cl2, drying in vacuo;