Kationische Thionitrosyl-Komplexe des Chroms / Cationic Thionitrosyl Complexes of Chromium

A nitromethane solution of NS + PF 6 - , obtained in situ from N 3 S 3 Cl 3 and AgPF 6 (1:3), reacts with benzene tricarbonyl chromium in acetonitrile solution to give the thionitrosyl-containing salt [Cr(NS)(NC-Me) 5 ](PF 6 ) 2 (1)-In the presence of Zerf-butyl isocyanide and Zn powder, 1 is reduced to [Cr(NS)(CN-CMe 3 ) 5 F 6 (3), while subsequent oxidation of 3 with either NOPF 6 or AgPF 6 leads to [Cr(NS)(CN-CMe 3 ) 5 ](PF 6 ) 2 (5). The thionitrosyl-containing salts 1, 3 and 5 are compared with the corresponding nitrosyl complexes.