Spin-crossover in iron(II) complexes with tris(pyrazol-1-yl)methane and сluster anions [{W 6 X 8 }X 6 ] 2– (X = Cl, Br, I)

O. G. Shakirova, E. V. Korotaev, D. V. Evtushok, N. V. Kuratieva, L. A. Sheludyakova, M. A. Shestopalov, L. G. Lavrenova

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Abstract

Iron(II) complexes with tris(pyrazol-1-yl)methane (HC(pz) 3 ) and cluster anions [{W 6 X 8 }X 6 ] 2– (X = Cl, Br, I) of the composition [Fe(HC(pz) 3 ) 2 ][{W 6 X 8 }X 6 ]⋅2H 2 O ((1–3)⋅2H 2 O) were synthesized. The compounds were characterized by element analysis, single-crystal and powder X-ray diffraction measurements, infrared, diffuse reflectance spectroscopy and static magnetic susceptibility. The temperature dependence μ eff (T) shows that the high-temperature spin-crossover (SCO) 1 A 1g5 T 2g is observed in both hydrates (1–3)·2H 2 O and dehydrated compounds (1–3). SCO is accompanied by thermochromism.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalJournal of Molecular Structure
Volume1193
DOIs
Publication statusPublished - 5 Oct 2019

Keywords

  • Cluster anion
  • Complex
  • Crystal structure
  • Iron(II)
  • Spin-crossover
  • Synthesis
  • Thermochromism
  • tris(pyrazol-1-yl)methane
  • MO
  • TRANSITION MOLECULAR MATERIALS
  • COORDINATION-COMPOUNDS
  • TEMPERATURE
  • CLOSO-BORATE COMPLEXES

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