Journalartikel

Autorenliste: Leibold, M; Kisslinger, S; Heinemann, FW; Hampel, F; Ichiyanagi, Y; Klein, M; Homenya, P; Renz, F; Toftlund, H; Brehm, G; Schneider, S; Reiher, M; Schindler, S

Jahr der Veröffentlichung: 2016

Seiten: 85-94

Zeitschrift: Journal of Inorganic and General Chemistry

Bandnummer: 642

Heftnummer: 1

ISSN: 0044-2313

DOI Link: https://doi.org/10.1002/zaac.201500684

Verlag: Wiley

Abstract: 
Iron(II) complexes of the type [Fe(L)(NCS)(2)] with tetradentate ligands L are well known to show spin crossover properties. However, this behavior is quite sensitive in regard to small changes of the ligand system. Starting from the thoroughly investigated complex [Fe(tmpa)(NCS)(2)] [tmpa = tris(2-pyridylmethyl)amine, also abbreviated as tpa in the literature] we modified the ligand by increasing systematically the chelate ring sizes from 5 to 6 thus obtaining complexes [Fe(pmea)(NCS)(2)], [Fe(pmap)(NCS)(2)], and [Fe(tepa)(NCS)(2)] [pmea = N,N-bis[(2-pyridyl)methyl]-2-(2-pyridyl)ethylamine, pmap = N,N-bis[2-(2-pyridyl)ethyl]-(2-pyridyl)methylamine, and tepa = tris[2-(2-pyridyl)ethyl]amine]. All complexes were structurally characterized and spin crossover properties were investigated using Mo ss bauer spectroscopy, magnetic measurements, and IR/Raman analyses. The results demonstrated that only the iron complexes with tmpa and pmea showed spin crossover properties, whereas the complexes with the ligands pmap and tepa only formed high spin complexes. Furthermore, DFT calculations supported these findings demonstrating again the strong influence of ligand environment. Herein the effect of increasing the chelate ring sizes in iron(II) isothiocyanato complexes with tetradentate tripyridyl-alkylamine ligands is clearly demonstrated.

Harvard-Zitierstil: Leibold, M., Kisslinger, S., Heinemann, F., Hampel, F., Ichiyanagi, Y., Klein, M., et al. (2016) Effect of Chelate Ring Size in Iron(II) Isothiocyanato Complexes with Tetradentate Tripyridyl-alkylamine Ligands on Spin Crossover Properties, Zeitschrift für anorganische und allgemeine Chemie = Journal of Inorganic and General Chemistry, 642(1), pp. 85-94. https://doi.org/10.1002/zaac.201500684

APA-Zitierstil: Leibold, M., Kisslinger, S., Heinemann, F., Hampel, F., Ichiyanagi, Y., Klein, M., Homenya, P., Renz, F., Toftlund, H., Brehm, G., Schneider, S., Reiher, M., & Schindler, S. (2016). Effect of Chelate Ring Size in Iron(II) Isothiocyanato Complexes with Tetradentate Tripyridyl-alkylamine Ligands on Spin Crossover Properties. Zeitschrift für anorganische und allgemeine Chemie = Journal of Inorganic and General Chemistry. 642(1), 85-94. https://doi.org/10.1002/zaac.201500684