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Issue 12, 2019
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Ion-pair complexes of Schiff base Fe(iii) cations and complex anions

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Compound [Fe(H2-4OH-L6)]Cl was used for preparation of four new ion-pair complexes with general formula: [Fe(H2-4OH-L6)][M(L3)2]·H2O (M = CoIII (3a), CrIII (3b) and FeIII (3c)) and [Fe(H2-4OH-L6)][Ag(CN)2] (3d), where H4-4OH-L6 = N,N′-bis[2,4-dihydroxy-(benzylideneamino)ethyl]ethane-1,2-diamine and H2L3 = 2-{(E)-[(2-hydroxyphenyl)imino]methyl}phenol. Furthermore, two [Fe(H-4OH-L6)] complexes (1a and 1b) with monodeprotonated hexadentate ligands were prepared. The crystal structures were determined by single-crystal X-ray measurements for all the above-mentioned complexes excluding 3c. Its isostructurality with 3a–b was confirmed by powder X-ray diffraction. The magnetic properties were investigated by static magnetic measurements and they are dominated by the high spin ground state of the complex cations and anions and at a smaller scale by the intermolecular interactions present among the molecules. The susceptibility and magnetization data were fitted simultaneously using the model for monomeric complexes including the zero-field splitting and the molecular field correction and these studies were supported also by CASSCF/NEVPT2 and BS-DFT calculations.

Graphical abstract: Ion-pair complexes of Schiff base Fe(iii) cations and complex anions

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Article information

11 Jan 2019
19 Feb 2019
First published
19 Feb 2019

New J. Chem., 2019,43, 4937-4946
Article type

Ion-pair complexes of Schiff base Fe(III) cations and complex anions

I. Nemec, P. Zoufalý, P. Jewula, P. Antal, W. Linert and R. Herchel, New J. Chem., 2019, 43, 4937
DOI: 10.1039/C9NJ00192A

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