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High-frequency EPR study of the high-spin FeII complex Fe[(SPPh2)2N]2

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2012

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Chatziefthimiou, Spyros D.
Maganas, Dimitrios
Sanakis, Yiannis
Sottini, Silvia
Kyritsis, Panayotis
Groenen, Edgar J. J.

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https://doi.org/10.1016/j.jmr.2012.09.005
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Journal of Magnetic Resonance : JMR. 2012, 224, pp. 94-100. ISSN 1090-7807. eISSN 1096-0856. Available under: doi: 10.1016/j.jmr.2012.09.005

Zusammenfassung

We report continuous-wave electron-paramagnetic-resonance (EPR) spectra of the high-spin FeII complex Fe[(SPPh2)2N]2 at 275.7 GHz, 94.1 GHz and 9.5 GHz. Combined analysis of these EPR spectra shows that the complex occurs in multiple conformations. For two main conformations the spin-Hamiltonian parameters, which reflect the electronic structure of the complex, are accurately determined: (1) D=9.17 cm-1 (275 GHz), E/D=0.021 and (2) D=8.87 cm-1 (266 GHz), E/D=0.052. The EPR spectra obtained at 275.7 GHz on single crystals of the complex are essential for the analysis and in addition they reveal that the two main conformations occur at two magnetically distinguishable sites.

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540 Chemie

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High-frequency, EPR Iron–sulfur coordination, High-spin FeII

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ISO 690MATHIES, Guinevere, Spyros D. CHATZIEFTHIMIOU, Dimitrios MAGANAS, Yiannis SANAKIS, Silvia SOTTINI, Panayotis KYRITSIS, Edgar J. J. GROENEN, 2012. High-frequency EPR study of the high-spin FeII complex Fe[(SPPh2)2N]2. In: Journal of Magnetic Resonance : JMR. 2012, 224, pp. 94-100. ISSN 1090-7807. eISSN 1096-0856. Available under: doi: 10.1016/j.jmr.2012.09.005
BibTex
@article{Mathies2012-11Highf-43416,
  year={2012},
  doi={10.1016/j.jmr.2012.09.005},
  title={High-frequency EPR study of the high-spin Fe<sup>II</sup> complex Fe[(SPPh<sub>2</sub>)<sub>2</sub>N]<sub>2</sub>},
  volume={224},
  issn={1090-7807},
  journal={Journal of Magnetic Resonance : JMR},
  pages={94--100},
  author={Mathies, Guinevere and Chatziefthimiou, Spyros D. and Maganas, Dimitrios and Sanakis, Yiannis and Sottini, Silvia and Kyritsis, Panayotis and Groenen, Edgar J. J.}
}
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    <dcterms:abstract xml:lang="eng">We report continuous-wave electron-paramagnetic-resonance (EPR) spectra of the high-spin Fe&lt;sup&gt;II&lt;/sup&gt; complex Fe[(SPPh&lt;sub&gt;2&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;N]&lt;sub&gt;2&lt;/sub&gt; at 275.7 GHz, 94.1 GHz and 9.5 GHz. Combined analysis of these EPR spectra shows that the complex occurs in multiple conformations. For two main conformations the spin-Hamiltonian parameters, which reflect the electronic structure of the complex, are accurately determined: (1) D=9.17 cm&lt;sup&gt;-1&lt;/sup&gt; (275 GHz), E/D=0.021 and (2) D=8.87 cm&lt;sup&gt;-1&lt;/sup&gt; (266 GHz), E/D=0.052. The EPR spectra obtained at 275.7 GHz on single crystals of the complex are essential for the analysis and in addition they reveal that the two main conformations occur at two magnetically distinguishable sites.</dcterms:abstract>
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