[Zurück]

I. Nemec, P. Zoufalý, P. Jewula, P. Antal, W. Linert, R. Herchel:
"Ion-pair complexes of Schiff base Fe(III) cations and complex anions";
New Journal of Chemistry, 43 (2019), S. 4937 - 4946 .

Compound [Fe(H2-4OH-L6)]Cl was used for preparation of four new ion-pair complexes with general formula: [Fe(H2-4OHL6)][ 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 ligand 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 smaller scale by the intermolecular interactions presented among the molecules. The susceptibility and magnetization data were fitted simultaneously using the model for monomeric complex including the zero-field splitting and the molecular field correction and these studies were supported also by CASSCF/NEVPT2 and BS-DFT calculations.

Ion-pair complexes, anion influence

http://dx.doi.org/10.1039/c9nj00192a