Synthesis, Characterization, Crystal and Molecular Structure Analysis of Di-μ-chlorido-bis{[(4-bromobenzoylmethylene) triphenyl-λ5-phosphorane]chloridomercury(II)}

Abstract

The reaction of phosphorus ylide Ph3PCHC(O)C6H4–4–Br with HgCl2 in equimolar ratios using methanol as a solvent is reported. This reaction led to binuclear complex C-Coordination of ylide and trans-like structure of complex [Br–BPPY HgCl2]2·2CHCl3(1) is demonstrated by single crystal X-ray analyses and IR, 1H and 31P NMR spectroscopy. Elemental analyses indicate a 1:1 stoichiometry between the ylide and Hg(II) in the product two Hg atoms are four-coordinate in the form of a tetrahedral. The title molecule [Hg2Cl4(C26H29BrOP)2]·2CHCl3(1) has a crystallographic inversion centre at the centroid of the four-membered ring formed by the two Hg atoms and two Cl atoms, with one short Hg–Cl(2.393A°) bond, one Hg–C bond and two asymmetric bridging Hg–Cl (bonds at distances o 2.7345 and 2.2.7090A. The crystal packing is stabilized by C–H…O hydrogen bonds. The reaction of phosphorus ylide Ph3PCHC(O)C6H4–4–Br with HgCl2 in equimolar ratios using methanol as a solvent is reported. This reaction led to binuclear complex C-Coordination of ylide and trans-like structure of complex [Br–BPPY HgCl2]2·2CHCl3(1) is demonstrated by single crystal X-ray analyses and IR, 1H and 31P NMR spectroscopy. Elemental analyses indicate a 1:1 stoichiometry between the ylide and Hg(II) in the product two Hg atoms are four-coordinate in the form of a tetrahedral. The title molecule [Hg2Cl4(C26H29BrOP)2]·2CHCl3(1) has a crystallographic inversion centre at the centroid of the four-membered ring formed by the two Hg atoms and two Cl atoms, with one short Hg–Cl(2.393A°) bond, one Hg–C bond and two asymmetric bridging Hg–Cl (bonds at distances o 2.7345 and 2.2.7090A. The crystal packing is stabilized by C–H…O hydrogen bonds.