The structure and properties of the triaquahexakis(methylthioacetato)-dineodymium(III) polymer, (Nd2(C3H5SO2)6(H2O) sub(n)), and the same-ligand complexes of lanthanoid elements

The crystal and molecular structure of the title complex has been determined by the X-ray diffraction method. The crystal was triclinic, space group P1, a = 12.80(1), b = 16.65(1), c = 8.659(9) A, α = 104.6(1), β = 93.7(2), γ = 107.5(1)0, Z = 2, Dsub(x) = 1.892(3), Dsub(m) = 1.91(2) Mg m-3, μ(Mo Kα) = 3.4 mm-1, and the final R value was 0.051 for 3577 reflections. The coordination number of both neodymium atoms is nine, although the coordinated atoms around one neodymium atom are arrayed in a tri-capped trigonal prism, and those around the other neodymium atom, in a mono-capped tetragonal antiprism. The neodymium atoms are arrayed on a linear chain bridged by the ligand; however, no metal-metal interaction is observed. The corresponding complexes of cerium(III), praseodymium(III), and europium(III) form isomorphous crystals with the title complex, but the complex of lanthanum(III) has the formula of ML3 . 4.5H2O (HL = (methylthio)acetic acid), and the complexes of dysprosium(III) and ytterbium(III), ML3.2H2O. (author)