Synthesis and structural characterization of mercury(II) complexes with a novel ferrocenyliminophosphine

A novel ligand ferrocenyliminophosphine [(η5-C5H5)Fe{(η5-C5H4)CHN(C6H4-2-PPh2)}] (1, L) is prepared and its complexation properties with mercury(II) have been studied. Halogen-bridged binuclear mercury (II) complexes [HgX(μ-X)L]2 (X = Cl (2a), Br (2b)) and a mononuclear mercury (II) complex HgCl2L2 (4a) have been obtained under different reaction conditions. In both cases, the ferrocenyliminophosphine acts as a P-monodentate ligand and the imino nitrogen does not participate in coordination to mercury (II).