The reactivity of [{Cp′′′Fe(CO)2}2(μ,η1 : 1-P4)] (1) towards half-sandwich complexes of Ru(II), Rh(III), and Ir(III) is studied. The coordination of these Lewis acids leads to a rearrangement of the P4 butterfly unit to form complexes with either an aromatic cyclo-P4R2 unit (R = Cp′′′Fe(CO)2) or a catena-tetraphosphaene entity.
