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Russian Journal of Coordination Chemistry

, Volume 30, Issue 12, pp 850–858 | Cite as

Researches on crystal and molecular structures of nine-coordination mononuclear K[EuIII(Edta)(H2O)3]⋅3.5H2O and binuclear K4[Eu 2 III (HTtha)2]⋅13.5H2O

  • J. Wang
  • X. D. Zhang
  • Y. Zhang
  • Y. Wang
  • X. Y. Liu
  • Z. R. Liu
Article

Abstract

The crystal and molecular structures of the K[EuIII(Edta)(H2O)3] ⋅ 3.5H2O (I) (H4Edta = ethylenediaminetetraacetic acid) and K4[Eu 2 III (HTtha)2] ⋅ 13.5H2O (II) (H6Ttha = triethylenetetraminehexaacetic acid) complexes have been determined by single-crystal X-ray diffraction analyses. The crystal of I belongs to orthorhombic crystal system and Fdd2 space group. The crystal data are as follows: a = 1.9849(6)nm, b = 3.5598(11)nm, c = 1.2222(4)nm, V = 8.636(5)nm3, Z = 16, M = 596.37, ρ(calcd) = 1.835g/cm3, µ= 3.166mm−1, and F (000) = 4752. The final R and wR values are 0.0269 and 0.0692 for 2936 (I > 2.0 σ(I)) reflections and 0.0317 and 0.0708 for all 7284 unique reflections, respectively. The [EuIII(Edta)(H2O)3] complex anion has a nine-coordination pseudo-monocapped square antiprismatic structure in which the nine coordinated atom are two N and seven O atoms (four from one Edta ligand and three water molecules). The crystal of II belongs to monoclinic system and P21/n space group. The crystal data are as follows: a = 1.1337(3)nm, b = 2.5753(6)nm, c = 2.2138(6) nm, β= 102.871(5)°, V = 6.301(3) nm3, Z = 4, M = 1682.33, ρ(calcd) = 1.773g/cm3, ε = 2.339mm−1, and F(000) = 3404. The final R and wR are 0.0514 and 0.0906 for 11144 (I> 2.0σ(I)) reflections and 0.0976 and 0.1068 for all 26 048 unique reflections, respectively. The whole complex molecule is composed of two close parts in which every one has a nine-coordination structure as a distorted monocapped square antiprism. The Ttha ligand in the [Eu 2 III (HTtha)2]4− complex anion coordinates to one central Eu 3+ ion with three N atoms and four O atoms and to the other Eu3+ ion with two O atoms.

Keywords

Edta Ethylenediaminetetraacetic Acid Complex Molecule Crystal Data Crystal System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© MAIK “Nauka/Interperiodica” 2004

Authors and Affiliations

  • J. Wang
    • 1
  • X. D. Zhang
    • 1
  • Y. Zhang
    • 1
  • Y. Wang
    • 1
  • X. Y. Liu
    • 1
  • Z. R. Liu
    • 1
  1. 1.Department of ChemistryLiaoning UniversityShenyangP.R. China

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