Abstract
Structure, energy characteristics, and magnetic properties of o-benzoquinone iron complexes with tetradentate macrocyclic nitrogen containing bases (pyridinophane and tris(2-pyridylmethyl)amine) are studied with a DFT (UTPSSh/6-311++G(d,p)) quantum chemical method. Electron withdrawing substituents in the redox-active ligand stabilize its dianionic form but do not significantly affect the energy difference between the electromers. Strong ferromagnetic exchange interactions are predicted in the isomers of complexes containing a high-spin divalent iron ion and the semiquinone form of o-benzoquinone. According to the calculations, all studied compounds can undergo thermally induced spin crossover transitions.
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The work was financially supported by the Council for Grants of the President of the Russian Federation (grant No. MK-1386.2018.3
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Russian Text © The Author(s), 2019, published in Zhurnal Strukturnoi Khimii, 2019, Vol. 60, No. 8, pp. 1272–1279.
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Starikova, A.A., Metelitsa, E.A. & Starikov, A.G. Electronic Structure and Magnetic Properties of o-Benzoquinone Iron Complexes with Tetraazamacrocyclic Ligands. J Struct Chem 60, 1219–1225 (2019). https://doi.org/10.1134/S002247661908002X
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DOI: https://doi.org/10.1134/S002247661908002X