Syntheses and Crystal Structure of Nine-Coordinate Mononuclear Na[Eu~Ⅲ (ed-ta) (H_2 O)_3 ] · 4H_2 O and Binuclear Na_4 [Eu_2~Ⅲ (Httha)_2 ] · 10H_2 O Complexes

【Author】

Wang Jun , Wang Yu, Liu Xinzhu, Liu Zhenrong, Zhang Zhaohong , Tong Jian (Department of Chemistry, Liaoning University, Shenyang 110036, China)

【Abstract】

<正> The crystal and molecular structures of the Na[ EuⅢ(edta) ( H2O)3 ] ·4H2O (edta = ethylenediaminetet-raacetic acid) and Na4[Eu2Ⅲ(Httha)2] ·10H2O (ttha = triethylenetetraminehexaacetic acid) complexes were determined by single-crystal X-ray structure analyses. The crystal of Na[ EuⅢ(edta) (H2O)3 ] ·4H2O belongs to ortho-rhombic crystal system and Fdd2 space group. The crystal data are as follows: a = 1.9415( 15)nm, b = 3.544(3) nm, c = 1.203(9)nm, V = 8.327(5)nm3, Z = 16, M = 589.27, Dc = 1.880 g ·cm-3, μ= 3. 108mm-1 and F(000) = 4704. The final R and wR values are 0.0312 and 0.0750 for 2091 [I >2.0σ(I) ] reflections, and 0.0344 and 0.0766 for all 3932 unique reflections, respectively. The [ EuⅢ(edta) (H2O) 3 ] - anion has a nine-coordinate pseu-do-monocapped square antiprismatic structure in which the nine coordinate atoms, two N and seven O, are from one edta ligand and three water molecules. The crystal of Na4 [ Eu2Ⅲ(Httha)2] ·10H2O belongs to orthorhombic system and Pccn space group. The crystal data are as follows: a = 2.610(3)nm, b = 2.089(3)nm, c = 2.239(3)nm, V = 12.208(28)nm3, Z = 8, M = 1548.92, Dc = 1.686g ·cm-3,μ= 2.115 mm-1 and F(000) = 6272. The final R and wR are 0.0625 and 0.1091 for 9834 [ I >2. 0σ( I) ] reflections, and 0.1608 and 0.1471 for all 37818 unique reflections, respectively. The whole complex molecule is composed of two close parts in which each one has a nine-coordinate structure with distorted monocapped square antiprismatic prism. The ttha ligand in the [Eu2Ⅲ(Httha)2]4- anion coordinates to one EuⅢion with three N atoms and four O atoms and to the other EuⅢion with two O atoms.

【Keywords】

EuⅢ ; edta (ethylenediaminetetraacetic acid); Httha (triethylenetetraminehexaacetic acid); mononuclear, binuclear; rare earth complex; structure

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Total: 21 articles

  • [1] J. Wang;X. D. Zhang;W. G. Jia;Y. Zhang;Z. R. Liu, Syntheses and Structural Researches of Nine-Coordinated (NH4)[EuIII(Edta)(H2O)3] · H2O and (NH4)3[EuIII(Ttha)] · 5H2O1, Russian Journal of Coordination Chemistry,
  • [2] Wang J; Zhang X D; Liu Z R, Sythenses and structural determination of binuclear nine-coordinate NH4 [ Yb2 (dtpa)2] · 9H2O, Journal of Molecular Structure, Journal of Molecular Biology (Journal of Molecular Biology)
  • [3] Carreira L A; Rizk M; Shabrawy YE, et al, Europium (Ⅲ) ion probe spectrofluorometric determination of di-clofenac sodium, Journal of Pharmaceutical and Bi-omedical Analysis,
  • [4] Wang J; Zhang X D; Ling X J, et al, Sythenses and structural determination of nine-coordinate K3 [ NdⅢ (nta)2(H2O)] ·6H2Oand K3[ ErⅢ (nta)2 ( H2O) ] · 5H2O, Journal of Molecular Structure, Journal of Molecular Biology (Journal of Molecular Biology)

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