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Low temperature magnetic ordering of a series of structurally characterized chloroferrates

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Abstract

Iron-57 Mössbauer spectroscopic results for a new series of related chloroferrate salts of complex ammonium cations are presented. In particular, spectra of materials based on FeCl −4 , FeCl 2−5 , FeCl −6 , [FeCl5(H2O)]2−, and [FeCl5(CH3OH)]2− anions are discussed relative to the systematics of their isomer shifts, coordination numbers, and low temperature 3D critical ordering temperatures. The following specific systems have been studied by Mössbauer spectroscopy and definitively characterized by single-crystal X-ray analysis: [CH3NH +3 ]4[FeCl6]3−[Cl−](A), [Me2N(μ-CH2CH2)2NMe +2 ][FeCl 2−5 ] (B), [H3NCH2CH2NH 2+3 ][FeCl5·H2O2−], (C), and [NH3(CH2)6NH 2+3 ]4[(FeCl 3−6 )(FeCl −4 )ClCl −4 ] (D). The spectral data for these complexes are considered in the light of results of previous studies for systems such as [K2FeCl5·H2O], [Co(NH3)6][FeCl6], diamethyltriethylenediammoniumpentachloroferrate (E), and the related [FeCl5·CH3OH]2− salt (F). The critical 3D ordering temperatures are ∼1.45, ∼6.80, ∼3.45, and 1.22K forA, B, C, andD, respectively.

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Authors and Affiliations

  1. Department of Chemistry, Northeastern University, 02115, Boston, MA, USA

    W. M. Reiff

  2. Departments of Chemistry and Physics, LaTrobe University, 3083, Bundoora, Victoria, Australia

    B. D. James, M. Bakalova & J. Liesegang

  3. Department of Physics and Inorganic Chemistry, University of Western Australia, 6009, Nedlands, WA, Australia

    A. H. White, B. W. Skelton & D. C. R. Hockless

Authors
  1. W. M. Reiff
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  2. B. D. James
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  3. M. Bakalova
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  4. J. Liesegang
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  5. A. H. White
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  6. B. W. Skelton
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  7. D. C. R. Hockless
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Reiff, W.M., James, B.D., Bakalova, M. et al. Low temperature magnetic ordering of a series of structurally characterized chloroferrates. Hyperfine Interact 94, 2081–2086 (1994). https://doi.org/10.1007/BF02063743

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