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Synthesis and Structure of Catena-[Bis(2-Methylimidazole)(μ-Phthalato)cobaltate(II)]

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Abstract

A new coordination compound [Co(Pht)(2-MeIm)2] (I), where Pht2–is the deprotonated radical of o-phthalic acid (H2Pht) and 2-MeIm is 2-methylimidazole, was synthesized. Its structure was established using X-ray diffraction analysis. The crystal is orthorhombic: space group Pca21, a= 15.350(3), b= 7.957(2), c= 13.997(3) Å, ρ(calcd.) = 1.505 g/cm3, and Z= 4. The tetrahedral coordination of the Co(II) atom includes two N atoms of two 2-methylimidazole molecules and two oxygen atoms of two carboxyl groups from different acid radicals. The Co–N distances are equal to 2.022(2) and 2.031(2) Å, while the Co–O distances are 1.972(2) and 2.000(2) Å. The carboxyl groups of the Pht2–radical and the aromatic nucleus form angles of 47.2° and 35.9°, whereas the angle formed by the carboxyl groups themselves is 50.3°. Compound Iis a polymer, which is confirmed by the 1,6-bridging function of the o-phthalic acid radical. The Co···Co distance in a chain is equal to 7.367 Å. Separate chains are united in the crystal into a framework via N–H···O hydrogen bonds.

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Authors and Affiliations

  1. Institute of Applied Physics, Academy of Sciences of Moldova, Chisinau, Moldova

    Yu. A. Simonov & I. G. Filippova

  2. Mickiewicz University, Poznan, Poland

    M. Gdaniec

  3. Institute of Chemistry, Academy of Sciences of Moldova, Chisinau, Moldova

    S. G. Baca, G. A. Timco & N. V. Gerbeleu

Authors
  1. Yu. A. Simonov
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  2. M. Gdaniec
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  3. I. G. Filippova
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  4. S. G. Baca
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  5. G. A. Timco
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  6. N. V. Gerbeleu
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Simonov, Y.A., Gdaniec, M., Filippova, I.G. et al. Synthesis and Structure of Catena-[Bis(2-Methylimidazole)(μ-Phthalato)cobaltate(II)]. Russian Journal of Coordination Chemistry 27, 353–359 (2001). https://doi.org/10.1023/A:1011302330761

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