DIHALOGENPHOSPHANCOMPLEXE ALS METALLORGANISHE SYNTHESEBAUSTEINE

Article abstract of DOI:10.1016/0022-328X(85)87140-0

The dichlorophosphanes (R)P(Cl)2 react with Fe2(CO)9 to give (CO)4Fe-P(R)(Cl)2 (I) in high yields.When treated with Fe2(CO)9 in 2.5 M excess, compounds I give the μ₂-chloro-μ₂-chlorophosphido-bridged dinuclear molecules II, Fe2(CO)6(μ₂-Cl)(μ₂-PRCl).Further treatment of II with Fe2(CO)9 resulsts in the formation of the trinuclear clusters IV, Fe3(CO)10(μ₃-PR).Zinc reduction of II leads to V, Fe4(CO)11)(μ₄-PR)2.All of these reactions lead to fairly high yields for a variety of substituents R.The product selectivity is effectively controlled by the stoichiometry.The syntheses and properties of the main products I,II,IV and V, as well as those of the dinuclear side-products <(CO)2(Cl)(RPCl2)Fe(μ₂-PRCl)>2 (III), <(CO)3Fe(μ₂-PRCl)>2 (VI), and the trinuclear species (CO)9Fe3(μ₃-PR)2 (VII), are discussed.