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
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
Affiliations
Dawit Tesfaye
Department of Industrial Chemistry, College of Natural and Applied Sciences, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
Jonas Braun
Institute of Inorganic Chemistry (AOC), Institute of Nanotechnology (INT) and Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
Mamo Gebrezgiabher
Department of Industrial Chemistry, College of Natural and Applied Sciences, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
Juraj Kuchár
Department of Inorganic Chemistry, Institute of Chemistry, P. J. Šafárik University in Košice, Moyzesova 11, 041 54 Košice, Slovakia
Juraj Černák
Department of Inorganic Chemistry, Institute of Chemistry, P. J. Šafárik University in Košice, Moyzesova 11, 041 54 Košice, Slovakia
Taju Sani
Department of Industrial Chemistry, College of Natural and Applied Sciences, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
Abbasher Gismelseed
Department of Physics, College of Science, Sultan Qaboos University, Al-Khod P.O. Box 36, Oman
Tim Hochdörffer
Department of Physiscs, University of Kaiserlautern-Landau, Erwin-Schrödinger-Strasse 46, 67663 Kaiserlautern, Germany
Volker Schünemann
Department of Physiscs, University of Kaiserlautern-Landau, Erwin-Schrödinger-Strasse 46, 67663 Kaiserlautern, Germany
Christopher E. Anson
Institute of Inorganic Chemistry (AOC), Institute of Nanotechnology (INT) and Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
Annie K. Powell
Institute of Inorganic Chemistry (AOC), Institute of Nanotechnology (INT) and Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
Madhu Thomas
Department of Industrial Chemistry, College of Natural and Applied Sciences, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
A new iron(III) complex (Et3NH)2[Fe(L)2](ClO4)·MeOH (1) where H2L = 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 L2− coordinate in a tridentate fashion with the Fe(III) through their deprotonated phenolic oxygens and azomethine nitrogen atoms, resulting in a trans-FeO4N2 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.
