Russian Journal of Coordination Chemistry

, Volume 45, Issue 8, pp 569–572 | Cite as

Structure of Barbituratobis(2,2'-Dipyridyl)copper(II) Heptahydrate

  • N. N. GolovnevEmail author
  • M. S. Molokeev
  • I. V. Sterkhova
  • M. K. Lesnikov


The structure of the complex [Cu(Bipy)2(BA)] ∙ 7H2O (I), where Bipy is 2,2'-dipyridyl, and BA2– is the barbituric acid anion (H2BA), is determined (CIF file CCDC no. 1887338). The thermal decomposition and IR spectrum of complex I are studied. The crystals are orthorhombic: a = 26.118(3), b = 27.685(3), c = 15.683(2) Å, V = 11 370(2) Å3, space group Fdd2, Z = 16. The discrete structure of the polar crystal consists of neutral [Cu(Bipy)2(BA)] particles and molecules of crystallisation water . The Cu2+ ion is bound to the N atoms of two bidentate Bipy molecules and the N atom of the BA2− ion at the vertices of the trigonal bipyramid CuN5. Compound I is the first example of the metal complex only with the N-coordinated anions of barbituric acid (BA2−, НBA). The structure is stabilized by hydrogen bonds O−H∙∙∙O and N−H∙∙∙O to form a three-dimensional network with the π–π interaction between the Bipy molecules. The compound begins to lose water at ~50°С and is completely dehydrated above 200°С.


copper(II) barbituric acid 2,2'-dipyridyl complex structure properties 



The X-ray diffraction data were obtained using the equipment of the Baikal and Krasnoyarsk Centers for Collective Use (Siberian Branch of the Russian Academy of Sciences).


This work was supported by the Ministry of Education and Science of the Russian Federation in the framework of the state task for the Siberian Federal University for 2017–2019 (4.7666.2017/BCh).


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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • N. N. Golovnev
    • 1
    Email author
  • M. S. Molokeev
    • 1
    • 2
    • 3
  • I. V. Sterkhova
    • 4
  • M. K. Lesnikov
    • 1
  1. 1.Siberian Federal UniversityKrasnoyarskRussia
  2. 2.Kirenskii Institute of Physics, Siberian Branch, Russian Academy of SciencesKrasnoyarskRussia
  3. 3.Far East State Transport UniversityKhabarovskRussia
  4. 4.Favorskii Institute of Chemistry, Siberian Branch, Russian Academy of SciencesIrkutskRussia

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