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Spectroscopic and magnetic evidence of coordination properties of bioactive diethyl (pyridin-4-ylmethyl)phosphate ligand with chloride transition-metal ions

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Abstract

A series of five chloride coordination compounds of diethyl (pyridin-4-ylmethyl)phosphate (4-pmOpe) ligand, i.e. [CuCl2(4-pmOpe)2], [NiCl2(4-pmOpe)4], [CoCl2(4-pmOpe)], [ZnCl2(4-pmOpe)2], and [CdCl2(4-pmOpe)2], was prepared and studied. Stoichiometry and stereochemistry of the compounds was confirmed by spectroscopic and magnetic studies as well as by elemental analyses. The 4-pmOpe ligand has a capacity to coordinate to metal ions by means of phosphoryl oxygen and/or nitrogen of pyridine atoms. In Cu(II), Ni(II), and Zn(II) compounds, 4-pmOpe adopts the monodentate coordination mode, bonding metal centers through the pyridine nitrogen atom only. On the contrary, in Co(II) and Cd(II) compounds, 4-pmOpe acts as N,O-bridging ligand forming polynuclear structures. Magnetic studies (1.8–300 K) indicate mononuclear structure of the Co(II) and Ni(II) compounds and suggest existence of a very weak exchange coupling between metal centers in crystal lattice.

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Authors and Affiliations

  1. Department of Bioinorganic Chemistry, Faculty of Pharmacy, Medical University, 1 Muszyńskiego St., 90-151, Lodz, Poland

    Urszula Kalinowska-Lis & Justyn Ochocki

  2. Faculty of Chemistry, University of Wroclaw, 14 F. Joliot-Curie St., 50-383, Wroclaw, Poland

    Bogumiła Żurowska

Authors
  1. Urszula Kalinowska-Lis
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  2. Bogumiła Żurowska
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  3. Justyn Ochocki
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Correspondence to Urszula Kalinowska-Lis.

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Kalinowska-Lis, U., Żurowska, B. & Ochocki, J. Spectroscopic and magnetic evidence of coordination properties of bioactive diethyl (pyridin-4-ylmethyl)phosphate ligand with chloride transition-metal ions. Chem. Pap. 65, 660–666 (2011). https://doi.org/10.2478/s11696-011-0056-8

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