Wang Jun , Wang Yu, Liu Xinzhu, Liu Zhenrong, Zhang Zhaohong , Tong Jian (Department of Chemistry, Liaoning University, Shenyang 110036, China)
<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.
EuⅢ ; edta (ethylenediaminetetraacetic acid); Httha (triethylenetetraminehexaacetic acid); mononuclear, binuclear; rare earth complex; structure
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