“…Their compositions and structures depend on the con ditions of the synthesis and the chlorine to chalcogen ratio in the reaction mixture. While the documented ternary osmium complexes with sulfur (selenium) and chlorine are few (OsS 2 Cl 12 and OsSe 2 Cl 12 [1] as the cation-anion complexes [OsCl 6 ] 2--2[:ChalCl 3 ] + ; OsS 4 Cl 2 [2] with an unclear structure), the number of quaternary complexes of the system Os-S-Se-Cl is substantially higher. For instance, the complex Os 4 S 11 SeCl 8 [3] is known to exist as the 1D polymer [Os 2 Cl 4 (μ S 2 )(μ S(S,Se)) 2 ] n , which is simultaneously a cluster containing a metal-metal bond and a molec ular complex with polychalcogenide groups.…”