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Novel Co(II) coordination polymers based on 1,2-bis(diphenylphosphino)ethane monoxide and dioxide ligands

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Abstract

Two analogous coordination polymers with a composition of [Co(μ-dppeO2)X2]n (dppeO2 = 1,2-bis(diphenylphosphino)ethane dioxide; X = Br, I) were successfully prepared in crystalline form by a reaction of 1,2-bis(diphenylphosphino)ethane (dppe) and corresponding cobalt(II) halide in dichloromethane–ethanol mixture under aerobic conditions. The results of single-crystal X-ray structure analysis have shown that both complexes form one-dimensional chains in which the dppeO2 functions as a bidentate O,O′-donor ligand bridging the cobalt(II) central atoms. The Co(II) atoms are hence tetracoordinated by two oxygen atoms from two distinct molecules of dppeO2 and two halogenido ligands yielding a distorted tetrahedral chromophore of {CoO2X2} (X = Br, I). Spectral properties of both complexes were studied by IR and UV–Vis spectroscopy. Moreover, crystal structure of two unprecedented polymeric complexes [Co(μ-dppeO)Br2]n and {[Co(μ-dppeO)Br2][Co(μ-dppeO2)Br2]}n isolated from the system CoBr2-dppe has been revealed.

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Acknowledgements

LS is thankful to Dr. Habil. Harry Schmidt for hospitality, cooperation and valuable discussions during his stay at Institute of Chemistry, Martin-Luther University Halle-Wittenberg (Sachsen-Anhalt, Germany) as well as the financial support of project KVARK (Operational Programme Education, ITMS:26110230084). Financial support of Slovak grant agencies APVV-14-0078 and VEGA (1/0063/17) is acknowledged. The crystallographic part was supported by the Project 18-10438S of the Czech Science Foundation using instruments of the ASTRA laboratory established within the Operation program Prague Competitiveness—Project CZ.2.16/3.1.00/24510.

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Authors and Affiliations

  1. Department of Medical and Clinical Biochemistry, Faculty of Medicine, P. J. Šafárik University in Košice, Kosice, Slovakia

    Lukáš Smolko

  2. Department of Inorganic Chemistry, Faculty of Sciences, P. J. Šafárik University in Košice, Kosice, Slovakia

    Juraj Černák

  3. Department of Structure Analysis, Institute of Physics, Czech Academy of Sciences, Prague, Czech Republic

    Michal Dušek

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  1. Lukáš Smolko
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  2. Juraj Černák
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  3. Michal Dušek
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Correspondence to Lukáš Smolko.

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Smolko, L., Černák, J. & Dušek, M. Novel Co(II) coordination polymers based on 1,2-bis(diphenylphosphino)ethane monoxide and dioxide ligands. Monatsh Chem 150, 639–647 (2019). https://doi.org/10.1007/s00706-019-2366-4

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  • DOI: https://doi.org/10.1007/s00706-019-2366-4

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