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Mercury(II) complexes of new bidentate phosphorus ylides: synthesis, spectra and crystal structures

Chemical Papers volume 68, pages 624–632 (2014)Cite this article

Abstract

The reaction of dppm (1,1-bis(diphenylphosphino)methane) with 2-bromo-4-phenylacetophenone and benzyl bromoacetate in chloroform produces new phosphonium salts, [Ph2PCH2PPh2CH2C(O) C6H4Ph]Br (I) and [Ph2PCH2PPh2CH2COOCH2Ph]Br (II). By allowing the phosphonium salts to react with the appropriate base, the bidentate phosphorus ylides, Ph2PCH2PPh2=C(H)C(O)C6H4Ph (III) and Ph2PCH2PPh2=C(H)C(O)OCH2Ph (IV), were obtained. The reaction of these ligands with mercury(II) halides in dry methanol led to the formation of the mononuclear complexes {HgX2[(Ph2PCH2PPh2C(H)C(O)C6H4Ph)]} (X = Cl (V); X = Br (VI); X = I (VII)) and {HgX2[(Ph2PCH2PPh2C(H)COOCH2Ph)]} (X = Cl (VIII); X = Br (IX); X = I (X)). The FTIR and 1H, 31P and 13C NMR spectra were studied. The structure of compound III was unequivocally determined by the single-crystal X-ray diffraction technique. Single-crystal X-ray analysis of the {HgBr2[(Ph2PCH2PPh2C(H)C(O)C6H4Me)]} complex (XI) revealed the presence of a mononuclear complex containing the Hg atom in a distorted tetrahedral environment. In all complexes, the ylides referred to above were coordinated through the ylidic carbon and the phosphine atom.

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Authors and Affiliations

  1. Faculty of Chemistry, Bu-Ali Sina University, Hamedan, 65174, Iran

    Seyyed Javad Sabounchei, Mohammad Panahimehr & Fateme Akhlaghi Bagherjeri

  2. Department of Chemistry, Shahid Beheshti University, Evin, Tehran, 1983963113, Iran

    Hamid Reza Khavasi

  3. School of Chemistry, University of Melbourne, Victoria, 3010, Australia

    Collete Boscovic

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  1. Seyyed Javad Sabounchei
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Sabounchei, S.J., Panahimehr, M., Khavasi, H.R. et al. Mercury(II) complexes of new bidentate phosphorus ylides: synthesis, spectra and crystal structures. Chem. Pap. 68, 624–632 (2014). https://doi.org/10.2478/s11696-013-0487-5

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