Synthesis, characterisation and redox behaviour of isocyanide incorporated, chalcogen stabilised mixed-metal clusters

Room temperature reaction of a benzene solution of [Cp2Mo2Fe2(CO)7(μ3-E)(μ3-E′)] (EE′=Se2 (1), STe (2), SeTe (3)) with PriNC or ButNC resulted in the formation of iron bonded isocyanide clusters [Cp2Mo2Fe2(RNC)(CO)6 (μ3-E)(μ3-E′)], [E=E′=Se, R=Pri (5) or But (9); E=S, E′=Te, R=Pri (6a, 6b) or R=But (10a, 10b); E=Se, E′=Te, R=Pri (7a, 7b) or R=But (11a, 11b)] and molybdenum bonded isocyanide clusters [Cp2(RNC)Mo2Fe2(CO)6(μ3-E)(μ3-E′)], [E=E′=Se, …