Photochemical reactions of Fe(CO)5 with FcC≡CH in the presence of S-powder and CS2: synthesis and characterization of [{μ-SC(H)=C(Fc)S}(CO)6Fe2], [μ-SC(O)C(H)=C(Fc)S}(CO)6Fe2]; cis-[μ-η1:η2:η1:η1-{C(Fc)=C(H)CS2C(H)=C(Fc)}(CO)6Fe2] and trans -[μ-η1:η2:η1:η1-{C(Fc)=C(H)CS2C(Fc)=C(H)}(CO)6Fe2]

Abstract

Photolysis of a hexane solution containing Fe(CO)5, ferrocenylacetylene and S-powder under argon at −30 °C led to the formation of two different products: [{μ-SC(H)=C(Fc)S}(CO)6Fe2] (1) and [{μ-SC(O)C(H)=C(Fc)S}(CO)6Fe2] (2) featuring new C–S, C–C, Fe–Fe and Fe–S bond formations. In presence of CS2, formation of cis-[μ-η1:η2:η1:η1-{C(Fc)=C(H)CS2C(H)=C(Fc)}(CO)6Fe2] (5) and trans-[μ-η1:η2:η1:η1-{C(Fc)=C(H)CS2C(Fc)=C(H)}(CO)6Fe2] (6) was observed, along with 1. All new compounds were characterized by IR and 1H and 13C NMR spectroscopy. Structures of 1, 2, 5 and 6 were established crystallographically.