Transition Metal Chemistry

, Volume 43, Issue 4, pp 323–330 | Cite as

Preparation, characterization and crystal structures of metal(II) tetraza macrocyclic complexes with organic co-ligands

  • In-Taek Lim
  • Jong-Hoon Park
  • Ki-Young Choi
  • Chong-Hyeak Kim
  • Yoon-Mi Choi


The complexes [Ni(L1)(pyc)2]·2H2O (1) (L1 = C-meso-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane; Hpyc = pyrazinecarboxylic acid) and [Cu(L2)(H-cpdc)] (2) (L2 = 3,14-dimethyl-2,6,13,17-tetraazatricyclo[14,4,01.18,07.12]docosane; H2-cpdc = cyclopropanedicarboxylic acid) have been synthesized and structurally characterized. The crystal structure of complex 1 shows a distorted octahedral coordination geometry around the nickel(II) center, with four secondary amines in the equatorial positions and two nitrogen atoms of the pyc ligands in the trans positions. In complex 2, the coordination environment around the copper(II) center is a Jahn–Teller distorted octahedron with four Cu–N bonds and two axial Cu–O bonds. The electronic spectra, electrochemical and TGA behavior of the complexes are significantly affected by the nature of the axial pyc and H-cpdc ligands.

Supplementary material

11243_2018_220_MOESM1_ESM.docx (128 kb)
Supplementary material 1 (DOCX 128 kb)


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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • In-Taek Lim
    • 1
  • Jong-Hoon Park
    • 1
  • Ki-Young Choi
    • 1
  • Chong-Hyeak Kim
    • 2
  • Yoon-Mi Choi
    • 2
  1. 1.Department of Chemistry EducationKongju National UniversityKongjuKorea
  2. 2.Center for Chemical AnalysisKorea Research Institute of Chemical Technology (KRICT)DaejeonKorea

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