Low-spin state structure of [Fe(chloroethyltetrazole)6](BF 4)2 obtained from synchrotron powder diffraction data

Eva Dova, René Peschar, Masaki Takata, Eiji Nishibori, Henk Schenk, Arno F. Stassen, Jaap G. Haasnoot

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13 Citations (Scopus)


The complex [Fe(teec)6]-(BF4)2 (teec = chloroethyltetrazole) shows a two-step complete spin-cross-over transition in the temperature range 300-90 K. Time-resolved synchrotron powder diffraction experiments have been carried out in this temperature range, and crystal structure models have been obtained from the powder patterns by using the parallel tempering technique. Of these models, the low-spin state structure at 90 K has been refined completely with Rietveld refinement. Its structural characteristics are discussed in relation to the high-spin state model and other spin-crossover compounds. The complex shows a remarkable anisotropic unit-cell parameter contraction that is dependent on the applied cooling rate. In addition, the possible important implications for the interpretation of spin-crossover behavior in terms of structural changes are discussed.

Original languageEnglish
Pages (from-to)5855-5865
Number of pages11
JournalChemistry - A European Journal
Issue number20
Publication statusPublished - 2005 Oct 7


  • Iron complexes
  • Spin crossover
  • Structure solution
  • X-ray diffraction


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