Synthesis and Structural Studies of Complexes of Bis(pentafluorophenyl)mercury with Di(phosphane oxide) Ligands

The reaction of bis(pentafluorophenyl)mercury with the ligands bis(diphenylphosphano) methane P,P’-dioxide ({Ph2P(O)}2CH2) (1), bis{2-(N,N,N’N’-tetraethyldiaminophosphano) imidazol-1-yl} ({2-PO(NEt2)2C3N2H2}2CH2) (2) and bis (2-diphenylphosphanophenyl) ether ({2-PPh2(O)C6H4}2O) (3) afforded crystalline σ-donor complexes [{Hg(C6F5)2}2{Ph2P(O)}2CH2] (1Hg), [Hg(C6F5)2{2-PO(NEt2)2C3N2H2}2CH2]n (2Hg) [Hg(C6F5)2{2-PPh2(O)C6H4}2O] (3Hg), respectively. molecular structures 1Hg, 2Hg 3Hg show considerable differences. In complex a single bridging bidentate ligand connects two three-coordinate T-shape mercury atoms near linear C-Hg-C atom array. Complex is one-dimensional coordination polymer in which adjacent four-coordinate array are linked by O,O’- ligands, whilst ligated monodentate fashion. Hg-O bond lengths differ substantially (range 2.5373(14)-2.966(3) Å) owing to structural bonding