Spin Crossover and Valence Tautomerism in Neutral Homoleptic Iron Complexes of Bis(pyridylimino)isoindolines.
Spin Crossover and Valence Tautomerism in Neutral Homoleptic Iron Complexes of Bis(pyridylimino)isoindolines.
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双(吡啶亚氨基)异吲哚啉中性均配铁配合物中的自旋交叉和价态互变异构
DOI:
10.1002/chem.201501551
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
M. Bröring
中科院分区:
文献类型:
--
作者:
A. Scheja;D. Baabe;D. Menzel;C. Pietzonka;P. Schweyen;M. Bröring
Homoleptic iron complexes of six bis(pyridylimino)isoindoline (bpi) ligands with different substituents (H, Me, Et,tBu, OMe, NMe2) at the 4‐positions of the pyridine moieties have been prepared and studied with regard to temperature‐dependent spin and redox states by a combination of57Fe Mössbauer spectroscopy, SQUID magnetometry, single‐crystal X‐ray diffraction analysis, X‐band EPR, and1H NMR spectroscopy. While the H‐, methyl‐, and ethyl‐substituted complexes remain in a pure high‐spin state irrespective of the temperature, the 4‐tert‐butyl‐substituted derivative shows spin‐crossover behavior. The methoxy‐ and dimethylamino‐substituted compounds were found to easily undergo oxidation. In the crystalline state, valence tautomeric behavior was observed for the methoxy derivative as a thermally activated charge‐transfer transition, accompanied by a spin crossover above 200 K. The valence tautomerism leads to a chelate with one of the bpi ligands as a dianion radical L2−.and with an effective spin ofS=2.
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DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
J. Pap;V. Bányai;Dávid S. Szilvási;J. Kaizer;G. Speier;M. Giorgi
通讯作者:
M. Giorgi
影响因子:
8.6
作者:
P. V. Koningsbruggen;Y. Maeda;H. Oshio
通讯作者:
P. V. Koningsbruggen;Y. Maeda;H. Oshio
影响因子:
3.9
作者:
Pap, Jozsef S.;Kripli, Balazs;Speier, Gabor
通讯作者:
Speier, Gabor
影响因子:
4
作者:
Broering, Martin;Kleeberg, Christian
通讯作者:
Kleeberg, Christian
影响因子:
4.6
作者:
Anderson, OP;la Cour, A;Wicholas, M
通讯作者:
Wicholas, M