“…Coordination compounds of iron(III) are being actively studied due to a spin-crossover phenomenon − or molecular magnet properties, − allowing them to be used in spintronics and quantum engineering. , Complexes of iron(III) are known to be capable of exhibiting the properties of molecular magnets, i.e., molecules with a directionally bistable magnetic moment, both in the case of polynuclear systems ,, and in the case of mononuclear compounds exhibiting the properties of a magnet at the level of one ion. , The Fe 3+ ions in the complexes show various coordination numbers, from 3 to 7; ,,− however, the magnetic properties of quasioctahedral iron(III) complexes have insufficiently been studied. Complexes in which Fe 3+ ions are in a distorted octahedral environment are characterized by negative or positive D values. ,− One of the major factors affecting the magnetic properties of coordination compounds of 3d-metals is the coordination environment of the central ion. − Therefore, the choice of an appropriate ligand plays a key role in the design of coordination compounds and, in some cases, enables us to synthesize compounds with the required properties. ,− …”