A.N. Gusev, S Shulgin, I. Riush, K. Lyssenko, I. Eremenko, W. Linert:
"A New family of Co(II), Ni(II), Fe(II) triple helicate systems on 5,5′-di(pyri- din-2-yl)-3,3′-bi(1,2,4-triazole) basis: synthesis, structure and magnetic studies";
Inorganica Chimica Acta, 456 (2017), S. 136 - 141.

Kurzfassung englisch:
Reaction of 5,5′-bi(pyridin-2-yl)-3,3′-bi(1,2,4-triazole) (H2L) with Ni(II), Co(II) and Fe(II) nitrates generates three novel dinuclear triple helicate complexes. Obtained compounds fully characterized by elemental analysis, UV-Vis and IR-spectroscopy. Moreover, the triple-helical structure of was con-firmed by X-ray in solid state and by ESMS-studies in solution. Complexation behavior was studied by UV-Vis spectrophotometric titration experiments that revealed the formation of species with 2:3 metal - ligand molar ratio. The magnetic properties of the Ni(II), Co(II) and Fe(II) are dominated by weak antiferromagnetic interactions (altogether with spin-orbital coupling in the Co(II) case). The magnetic studies of air and vacuum dried Iron complex samples indicate that lattice water molecules directly affect the magnetic behavior of these complexes.

Dinuclear triple helicate; Triazole; Magnetic studies

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