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Anion influence on spin state in two novel Fe(III) compounds: [Fe(5F-sal2333)]X

Sundaresan, S.; Kühne, I. A.; Kelly, C. T.; Barker, A.; Salley, D.; Müller-Bunz, H.; Powell, A. K.; Morgan, G. G.

Structural and magnetic data on two iron (III) complexes with a hexadentate Schiff base chelating ligand and Cl¯ or BPh₄¯ counterions are reported. In the solid state, the Cl¯ complex [Fe(5F-sal₂333)]Cl, 1, is high spin between 5–300 K while the BPh₄¯ analogue [Fe(5F-sal₂333)]BPh₄, 2, is low spin between 5–250 K, with onset of a gradual and incomplete spin crossover on warming to room temperature. Structural investigation reveals different orientations of the hydrogen atoms on the secondary amine donors in the two salts of the [Fe(5F-sal₂333)]⁺ cation: high spin complex [Fe(5F-sal₂333)]Cl, 1, crystallizes with non-meso orientations while the spin crossover complex [Fe(5F-sal₂333)]BPh₄, 2, crystallizes with a combination of meso and non-meso orientations disordered over one crystallographic site. Variable temperature electronic absorption spectroscopy of methanolic solutions of 1 and 2 suggests that both are capable of spin state switching in the solution.

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Verlagsausgabe §
DOI: 10.5445/IR/1000090533
Veröffentlicht am 06.02.2019
Seitenaufrufe: 18
seit 08.02.2019
Downloads: 21
seit 08.02.2019
Zugehörige Institution(en) am KIT Institut für Anorganische Chemie (AOC)
Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 2073-4352
KITopen-ID: 1000090533
HGF-Programm 43.21.04 (POF III, LK 01)
Erschienen in Crystals
Band 9
Heft 1
Seiten Art. Nr.: 19
Vorab online veröffentlicht am 29.12.2018
Schlagworte Fe(III) coordination complexes, hexadentate ligand, Schiff base, spin crossover, UV-Vis spectroscopy, SQUID, EPR spectroscopy
Nachgewiesen in Scopus
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