Substituent Effects on the Spin-Transition Temperature in Complexes with Tris(pyrazolyl) Ligands
| Autor: | Alfred X. Trautwein, Hauke Paulsen, Lars Duelund, Michael Gerdan, Axel Zimmermann, Hans Toftlund, Heiner Winkler, Frédéric Averseng |
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| Rok vydání: | 2012 |
| Předmět: |
Tris
Chemical Physics (physics.chem-ph) Bromine Transition temperature digestive oral and skin physiology Substituent Spin transition chemistry.chemical_element FOS: Physical sciences General Chemistry Magnetic susceptibility Spectral line chemistry.chemical_compound Crystallography chemistry Physics - Chemical Physics Mössbauer spectroscopy |
| Zdroj: | Paulsen, H, Duelund, L, Zimmermann, A, Averseng, F, Gerdan, M, Winkler, H, Nielsen, H T & Trautwein, A X 2003, ' Substituent Effects on the Spin-Transition Temperature in Complexes with Tris(pyrazolyl) Ligands ', Monatshefte für Chemie / Chemical Monthly, vol. 134, pp. 179-190 . https://doi.org/10.1007/s00706-002-0522-7 |
| DOI: | 10.48550/arxiv.1206.1883 |
| Popis: | Iron (II) complexes with substituted tris(pyrazolyl) ligands, which exhibit a thermally driven transition from a low-spin state at low temperatures to a high-spin state at elevated temperatures, have been studied by M\"ossbauer spectroscopy and magnetic susceptibility measurements. From the observed spectra the molar high-spin fraction and the transition temperature have been extracted. All substituents, except for bromine, lead to a decrease of the transition temperature. Density functional calculations have been carried out to compare the experimentally observed shifts of the transition temperature with those derived from theory. |
| Databáze: | OpenAIRE |
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