Article,

Synthesis of New Phosphonium Ylides Containing Thiophene and Furan Rings and Study of Their Reaction with Mercury(II) Halides: Spectral and Structural Characterization

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HELVETICA CHIMICA ACTA, 93 (6): 1105-1119 (2010)

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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