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The NH[Eu(Cydta)(HO)]·4.5HO ( I) (HCydta = trans-1,2-cyclohexanediamine-N,N,N′,N′-tetraacetic acid) and K[Eu(pdta)(HO)]·6HO ( II) (Hpdta = propylenediamine-N,N,N′,N′-tetraacetic acid) complexes are prepared by heat-refluxing and acidity-adjusting methods respectively, and their composition and structures are determined by elemental analyses and single crystal X-ray diffraction techniques. The complex I has a mononuclear structure, crystallizes in the triclinic crystal system with the $P\bar 1$ space group; the central Eu ion is eight-coordinated by a hexadentate Cydta ligand and two water molecules. The crystal data are as follows: a = 8.653(4) Å, b = 10.041(4) Å, c = 14.405(6) Å, α = 88.469(6)°, β = 74.892(6)°, γ = 88.256(7)°, V = 1207.5(9) Å, Z = 1, D = 1.731 g/cm, μ = 2.669 mm, F(000) = 638, R = 0.0257, and wR = 0.0667 for 3807 observed reflections with I ≥ 2σ( I). The EuNO part in the [Eu(Cydta)(HO)] complex anion forms a pseudo-square antiprismatic polyhedron. The complex II is eight-coordinate as well; it is a binuclear structure that crystallizes in the monoclinic crystal system with the C/ c space group; half of the central Eu ion is coordinated by two nitrogen atoms from one hexadentate pdta ligand and six oxygen atoms from the same pdta ligand, one water molecule and carboxylic group from the neighboring pdta ligand respectively. The crystal data are as follows: a = 19.866(3) Å, b = 9.1017(12) Å, c = 21.010(3) Å, β = 104.972(2)°, V = 3670.1(9) Å, Z = 8, D = 2.046 g/cm, μ = 3.710 mm, F(000) = 2240, R = 0.0213 and wR = 0.0460 for 4183 observed reflections with I ≥ 2σ( I). Otherwise, the two EuNO parts in the [Eu(pdta)(HO)] complex anion form a pseudo-square antiprismatic polyhedron. [ABSTRACT FROM AUTHOR]

The (NH)[Yb(ttha)]·5HO ( I) (Httha = triethylenetetramine-N,N,N′,N″,N‴,N‴-hexaacetic acid) and (NH)[Yb(pdta)(HO)]·5HO ( II) (Hpdta = propylenediamine-N,N,N′,N′-tetraacetic acid) complexes are synthesized by heat-refluxing and acidity-adjusting methods, and their structures are determined by single crystal X-ray diffraction techniques. These two complexes are all mononuclear structures. The complex I crystallizes in ttha monoclinic crystal system with the P2/ c space group. The central Yb ion is nine-coordinated only by one the ligand, and one non-coordinate carboxyl group is left. The crystal data are as follows: a = 10.321(4) Å, b = 12.744(5) Å, c = 23.203(9) Å, β = 91.082(6)°, V = 3051(2) Å, Z = 4, D = 1.754 g/cm, μ = 3.150 mm, F(000) = 1636, R = 0.0357, and wR = 0.0672 for 6203 observed reflections with I ≥ 2σ( I). The YbNO part in the [Yb(ttha)] complex anion forms a pseudo-monocapped square antiprismatic polyhedron. The complex II is coordinated with one pdta ligand and two water molecules, which form an eight-coordinate structure, and crystallizes in the triclinic crystal system with the $P\bar 1$ space group. The YbNO part in the [Yb(pdta)(HO)] complex anion makes a pseudo-square antiprismatic polyhedron. The crystal data are as follows: a = 9.8923(9)Å, b = 10.9627(10) Å, c = 12.2618(11) Å, α = 67.284(5)°, β = 70.956(6)°, γ = 68.741(5)°, V = 1115.97(18) Å, Z = 2, D = 1.843 g/cm, μ = 4.264 mm, F(000) = 618, R = 0.0177, and wR = 0.0409 for 4036 observed reflections with I ≥ 2σ( I). [ABSTRACT FROM AUTHOR]