Nouvell préparation, propriétés electrochimiques et etude structurale des phosphaferrocenes η5-C5Me5Fe-η5-PC4(R4)

A new synthesis of phosphaferrocenes is described. It involves nucleophilic attack of a phospholyl anion on a metastable cyclopentadienyliron acetylacetonate. The monoelectronic oxidation of the phosphaferrocenes thus obtained has been studied by cyclic voltammetry in various solvents. The X-ray structures of [η5-C5Me5Fe-η5-PC4(C6H5)4] is discussed and compared with the structure of [η5-C5H5Fe-η5-PC4H2(CH3)2].