The hexakis(thiocyanato)ferrate(III) ion: A coordination chemistry classic reveals an interesting geometry pattern for the thiocyanate ligands

Anthony W. Addison, Raymond J. Butcher, Zoltán Homonnay, Vitaly V. Pavlishchuk, Michael J. Prushan, Laurence K. Thompson

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

(NMe4)3[Fe(NCS)6] crystallizes from ethanol in the monoclinic space group C2/c. Two different types of complex ions are contained in the unit cell, though both possess exclusively N-coordination of the thiocyanate ligands. In one ion, the thiocyanate ligands are all essentially linearly bound, with an Fe-N-C angle of 174±4°, while in the other, there are two cis-thiocyanate ligands with a notably small Fe-N-C angle of 146.5°. The EPR and Mössbauer results show that all the iron(III) centers maintain the high-spin state down to 80 K, while the magnetic susceptibility confirms this to 2 K. Infrared and Mössbauer spectra provide evidence for an unusually "soft" lattice. Traditional criteria for interpretation of the infrared frequencies are not strictly applicable for this compound.

Original languageEnglish
Pages (from-to)2404-2408
Number of pages5
JournalEuropean Journal of Inorganic Chemistry
Issue number12
DOIs
Publication statusPublished - Jun 20 2005

Keywords

  • Coordination modes
  • IR spectroscopy
  • Iron
  • Isomers
  • Magnetic properties
  • Moessbauer spectroscopy
  • Thiocyanate
  • X-ray diffraction

ASJC Scopus subject areas

  • Inorganic Chemistry

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