Journal of Cluster Science

, Volume 14, Issue 3, pp 205–214 | Cite as

Rare-Earth Substituted Polyoxoanions: [{La(CH3COO)(H2O)22-P2W17O61)}2]16− and [{Nd(H2O)32-P2W17O61)}2]14−

  • Ulrich Kortz

Abstract

The lanthanum-substituted polyoxometalate [{La(CH3COO)(H2O)2(α2-P2W17O61)}2]16− (1) and the neodymium-substituted species [{Nd(H2O)3(α2-P2W17O61)}2]14− (2) have been synthesized and characterized by IR spectroscopy and elemental analysis. Single-crystal X-ray analysis was carried out on K16[{La(CH3COO)(H2O)2(α2-P2W17O61)}2]⋅36H2O, which crystallizes in the triclinic system, space group P¯1, with a=12.3863(6) Å, b=12.8934(6) Å, c=31.7285(14) Å, α=84.2000(10)°, β=81.2300(10)°, γ=61.6500(10)°, and Z=1; K6.5Nd2.5[{Nd(H2O)3(α2-P2W17O61)}2]⋅55H2O, which crystallizes in the monoclinic system, space group P21/n, with a=17.5030(9) Å, b=23.7842(12) Å, c=19.1869(10) Å, β=100.6610(10)°, and Z=1. The head-on, trans-oid dimer 1 consists of two (α2-P2W17O61)10− fragments connected by a lanthanum-acetate dimer, (La2(CH3COO)2(H2O)4)4+. Each La3+ ion is nine-coordinated in a monocapped, square-antiprismatic fashion. The neodymium-derivative 2 is also a trans-oid dimer, but the mode of binding is different from 1 and is best described as side-on. Each Nd3+ ion is eight-coordinated in a square-antiprismatic fashion with three terminal water molecules.

polyoxotungstate self-assembly X-ray crystallography rare earth 

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Copyright information

© Plenum Publishing Corporation 2003

Authors and Affiliations

  • Ulrich Kortz
    • 1
  1. 1.School of Engineering and ScienceInternational University BremenBremenGermany

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