摘要:
The crystal and molecular structures of the (NH4)[Eu-III(Edta)(H2O)(3)].H2O (1); Edta(4-) is an ethylenediaminetetraacetate anion) and (NH4)(3)[Eu-III(Ttha)].5H(2)O (II); Ttha(6-) is a triethylenetetraminehexaacetate anion) complexes have been determined by single-crystal X-ray structure analysis. The crystal of complex I is orthorhombic with Fdd2 space group. The crystal data are as follows: a = 1.9505(8) nm, b = 3.5445(14) nm, c = 1.2442(5) nm, V = 8.602(6) nm(3), Z = 16, M = 531.29, p = 1.579 g cm(-3), mu = 2.970 mm(-1), and F(OOO) = 3924. The final R and wR values are 0.0378 and 0.1030 for 2799 (I > 2.0sigma(I)) unique reflections, and 0.0495 and 0.1072 for all 6237 reflections, respectively. The nine-coordinated [Eu-III(Edta)(H2O)(3)](-) complex anion has a pseudo-monocapped square antiprismatic structure in which the nine coordinated atoms, two N and four O are from one Edta ligand and three O atoms from water molecules. The crystal of complex H is monoclinic with P2(1)/c space group. The crystal data are as follows: a = 1.0387(3) nm, b = 1.2737(4) nm, c = 2.3031(7) nm, beta = 90.870(5)degrees, V = 3.047(2) nm(3), Z = 4, M = 784.58, C 51.83, H 4.32, N 115.12. rho = 1.710 g cm(-3), mu = 2.143 mm(-1) and F(000) = 1608. The final R and wR are 0.0400 and 0.0720 for 5909 (I > 2.0sigma(I)) unique reflections, and 0.0747 and 0.0799 for all 13 825 reflections, respectively. The nine-coordinated [Eu-III(Ttha)](3-) complex anion has a pseudo-monocapped square antiprismatic! structure in which the Ttha acts as an ninedentate ligand with four N atoms of amino groups and five O atoms of carboxylic groups actually, in addition, there is a non-coordinated free carboxylic group in the structure.