Abstract (C 6 F 5) 3 Sb has been found to react with interhalogens and halo- pseudohalogens, IX (X= Cl, Br, N 3 and NCO), pseudohalogen (SCN), and elemental sulphur to give oxidative addition products (I–VI).(C 6 F 5) 3 SbS (VI) may also be prepared by the reaction of (C 6 F 5) 3 SbCl 2 with H 2 S. Metathetical reactions of (C 6 F 5) 3 SbCl 2 with appropriate metallic salts yield covalent pentacoordinate disubstituted products (V, VII ...