Abstract
Reactions of phosphonium ylides (4-MeC(6)H(4))(3)PCHC(=O)(2-C(4)H(3)S)
(tptpy), Ph(3)PCHC(=O)(2-C(4)H(3)O) (fppy), and
(4-MeC(6)H(4))(3)PCHC(=O)(4-BrC(6)H(4)) (bbtppy) with HgX(2) (X = Cl,
Br, and I) in equimolar ratios in MeOH as solvent leads to the binuclear
products 1-3 (Scheme I). The bridge-splitting reaction of the binuclear
complex \HgI(2)(bbtppy)\(2) (3c) by DMSO yields the mononuclear
complex HgI(2)center dot(bbtppy) (DMSO) (3d) (Scheme 2). This
bridge-splitting reaction can also be a method for the synthesis of
mononuclear products. C-Coordination of the ylide and O-coordination of
DMSO are demonstrated by a single-crystal X-ray-analysis of the
mononuclear complex 3d. Characterization of the obtained compounds was
also performed by means of elemental analysis and IR and (1)H-, (31)P-,
and (13)C-NMR spectroscopy. A theoretical study of some Hg(II) complexes
with phosphonium ylides is also reported.
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