Synthesis, reactivity and transition metal complexes of 1,1?-bis(diethynylphosphino)ferrocene

The synthesis, oxidation reactions and transition metal complexes of a new ferrocenyl-bisphosphine, [Fe{C5H4P(C?CH)2}2] (1), are described. reaction bis(dichlorophosphino)ferrocene with four equivalents ethynylmagnesium bromide resulted in the formation 1 76% yield. between 1, aqueous H2O2 or elemental sulphur produced bis(oxide) bis(sulfide) derivatives, [Fe{C5H4P(E)(C?CH)2}2] (2 E = O, 3 S). Reaction [Ru(?6-p-cymene)Cl2]2 yielded diruthenium complex [Fe{C5H4P(C?CH)2}2{RuCl2(?6-p-cymene)}2] (4). Treatment [M(COD)Cl2] (M Pd, Pt) [Fe{C5H4P(C?CH)2}2{MCl2}] (5 M 6 Pt). Equimolar CuX binuclear complexes, [Fe{C5H4P(C?CH)2}2{CuX}2] (7 X Cl, 8 Br, 9 I).