Russian Journal of Coordination Chemistry

, Volume 43, Issue 5, pp 304–313 | Cite as

Synthesis and structural determination of 2D ladder-like mononuclear nine-coordinate (EnH2)[NdIII(Egta)H2O]2 · 6H2O and ten-coordinate (EnH2)1.5[NdIII(Ttha)] · 5H2O

  • F. Y. Tian
  • G. H. Liu
  • B. Li
  • Y. T. Song
  • J. Wang
Article
  • 21 Downloads

Abstract

Two novel lanthanide complexes, (EnH2)[NdIII(Egta)H2O]2 · 6H2O (I) and (EnH2)1.5[NdIII(Ttha)] · 5H2O (II), where En = ethylenediamine, H4Egta = ethyleneglycol-bis-(2-aminoethylether)-N,N,N′,N'-tetraacetic acid and H6Ttha = triethylenetetramine-N,N,N',N'',N''',N'''-hexaacetic acid, have been successfully synthesized through direct heating reflux and their molecular and crystal structures were determined by FT-IR spectroscopy, thermal analysis and single crystal X-ray diffraction (CIF files CCDC nos. 1436598 (I) and 1433221 (II)). X-ray diffraction reveals that I has a nine-coordinate mononuclear structure with pseudo-monocapped square antiprismatic conformation. Complex I crystallizes in a monoclinic system with P21/c space group; a = 13.0919(12), b = 12.6840(11), c = 16.9751(14) Å, β = 122.069(3)° and V = 2388.7(4) Å3. Complex II takes ten-coordinated structure with a distorted bicapped square antiprismaticprism belong to triclinic crystal system with P1 space group; a = 9.9376(10), b = 12.2178(12), c = 15.2671(16), β = 100.2480(10)° and V = 1609.5(3) Å3. Each EnH2 2+ cation in I connects four adjacent [NdIII(Egta)H2O] anions through hydrogen bonds. In II crystal cell, there are two types of cations, which form hydrogen bonds with the neighboring [NdIII(Ttha)]3– anions, leading to the formation of a 2D ladder-like layer structure. The results showed that the change of ligands can lead to change of the structure of the complexes, coordination numbers and coordination geometries. Thus, it can be concluded that the shape of ligands play a crucial role on the coordinate structure of complexes, coordination numbers and coordination geometries.

Keywords

synthesis structural determination nine-coordinate ten-coordinate Nd(III) complex 

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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  • F. Y. Tian
    • 1
  • G. H. Liu
    • 1
  • B. Li
    • 1
  • Y. T. Song
    • 1
  • J. Wang
    • 1
  1. 1.Department of ChemistryLiaoning UniversityShenyangP.R. China

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