Premium
High‐Spin Mononuclear Iron(III) Complexes with Pentadentate Schiff Base Ligands: Structural Analysis and Magnetic Properties
Author(s) -
Pogány Lukáš,
Moncol Ján,
Pavlik Ján,
Mazúr Milan,
Šalitroš Ivan
Publication year - 2019
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201800658
Subject(s) - schiff base , chemistry , crystallography , electron paramagnetic resonance , spin states , zero field splitting , inorganic chemistry , nuclear magnetic resonance , spin polarization , physics , quantum mechanics , electron
Various substituted 2‐hydroxybenzophenones were combined with aliphatic linear triamines to form pentadentate Schiff base ligands. Twelve new iron(III) complexes with the general formula [Fe(L n )X]. m CH 3 CN ( n =1–10; X=N 3 − , NCS − or NCSe − ; m =0–2) have been synthesized, and spectrally as well as structurally characterized. The structural analysis revealed a notable dependence of coordination polyhedra deformation as well as the spatial configuration of donor atoms on the length and symmetry of the Schiff base ligands. The magnetic properties of the compounds were investigated and the permanent high‐spin state (S=5/2) for all reported compounds was established, and allowed calculation of zero‐field‐splitting parameters as well as coupling constants, which were further confirmed with DFT calculations. The solid‐state EPR spectra were recorded at 293 K and 98 K, and in accordance with the magnetic measurements, showed a high‐spin state in the measured temperature range.