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DOI: 10.5445/IR/1000090533
Veröffentlicht am 06.02.2019

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.

Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Institut für Anorganische Chemie (AOC)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 2073-4352
URN: urn:nbn:de:swb:90-905331
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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