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

  • Seyyed Sabounchei EMAIL logo , Mohammad Panahimehr , Hamid Khavasi , Fateme Bagherjeri und Collete Boscovic
Veröffentlicht/Copyright: 28. Januar 2014
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Chemical Papers
Aus der Zeitschrift Chemical Papers Band 68 Heft 5

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.

Keywords: unsymmetrical phosphorus ylides; Hg(II) complexes; X-ray crystal structure

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Published Online: 2014-1-28
Published in Print: 2014-5-1

© 2013 Institute of Chemistry, Slovak Academy of Sciences

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https://doi.org/10.2478/s11696-013-0487-5
Schlagwörter für diesen Artikel
unsymmetrical phosphorus ylides; Hg(II) complexes; X-ray crystal structure

Artikel in diesem Heft

  1. A spectrophotometric method for plant pigments determination and herbs classification
  2. Catalysis and reaction mechanisms of N-formylation of amines using Fe(III)-exchanged sepiolite
  3. Effect of support on activity of palladium catalysts in nitrobenzene hydrogenation
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