Mononuclear Fe(III) Schiff Base Complex with Trans-FeO<sub>4</sub>N<sub>2</sub> Chromophore of <i>o</i>-Aminophenol Origin: Synthesis, Characterisation, Crystal Structure, and Spin State Investigation
oleh: Dawit Tesfaye, Jonas Braun, Mamo Gebrezgiabher, Juraj Kuchár, Juraj Černák, Taju Sani, Abbasher Gismelseed, Tim Hochdörffer, Volker Schünemann, Christopher E. Anson, Annie K. Powell, Madhu Thomas
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2024-06-01 |
Deskripsi
A new iron(III) complex (Et<sub>3</sub>NH)<sub>2</sub>[Fe(L)<sub>2</sub>](ClO<sub>4</sub>)·MeOH (1) where H<sub>2</sub>L = 2-{(E)-[2-hydroxyphenyl)imino]methyl}phenol has been synthesised and characterised by single crystal XRD, elemental analysis and DC magnetic susceptibility measurements. The dianionic ligands L<sup>2−</sup> coordinate in a tridentate fashion with the Fe(III) through their deprotonated phenolic oxygens and azomethine nitrogen atoms, resulting in a trans-FeO<sub>4</sub>N<sub>2</sub> chromophore. Variable-temperature magnetic measurements were performed between 300 and 5 K under an applied field of 0.1 T and show that 1 is in the high spin state (S = 5/2) over the whole measured temperature range. This is confirmed by Mössbauer spectroscopy at 77 and 300 K.