Inorganic Chemistry, Vol.36, No.21, 4749-4752, 1997
Multinuclear NMR spectroscopic and X-ray crystallographic studies of a series of mercury(II) complexes containing the bidentate phosphine ligand Ph2PCH2Si(CH3)(2)CH2PPh2 (L-2)
The bidentate phosphine ligand Ph2PCH2Si(CH3)(2)CH2PPh2 (L-2), an analogue of 1,3-bis(diphenylphosphino)-propane (dppp), coordinates to mercury((II)) salts to form complexes of the general formula [HgX2 . L-2] (X = Cl, Br, I, NCS). Infrared, Raman, and multinuclear (H-1, C-13, P-31, Hg-199) NMR spectroscopic studies show that the complexes exhibit four-coordinate pseudotetrahedral metal geometry. [HgI2(Ph2PCH2Si(CH3)(2)CH2PPh2)] (1) crystallizes in the monoclinic space group P2(1)/n with a = 13.028(2) Angstrom, b = 17.402(5) Angstrom, c 13.849(2) Angstrom, beta = 90.635(14)degrees, V= 3139.5(11) Angstrom(3), and Z = 4. The structure contains a tetrahedral mercury center with the phosphine ligand bound in a bidentate fashion: Hg-P 2.521(2), 2.515(2) Angstrom; P-Hg-P 105.28(6)degrees. The complex [HgCl2](2) . L-2 has also been generated via a 2:1 metal:phosphine stoichiometry.