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Usatyuk V. G. Medzhidov A. A. Aydin A. Yalchin B. Manafova R. A. 《Russian Journal of Coordination Chemistry》2004,30(9):648-654
The reactions of Cu2+, Co2+, and Ni2+ ions with N-phenyl-N-2-hydroxybenzyl- and N-phenyl-N-2-hydroxynaphthylmethyleneamine derivatives (HL
n
, n = 1–8) produced from the derivatives of aniline and aromatic -hydroxyaldehydes are studied. Among the ions studied, only Cu2+ forms stable complexes Cu(L
n
)2 · 2H2O. The structures of the synthesized compounds are studied by IR, UV, and EPR spectroscopies and differential thermal analysis. The magnetic moments of the Cu(L
n
)2 · 2H2O complexes are very small and range within 0.43–1.19 B, depending on the ligand structure, which indicates a strong antiferromagnetic interaction between the Cu2+ ions. The temperature dependence of the magnetic susceptibility measured for the Cu(L3)2 · 2H2O complex (where HL3 is N-4-methoxyphenyl-N-2-hydroxybenzylamine) is closest to the theoretical curve calculated for the binuclear Cu(II) complexes connected by the intermolecular exchange interaction. The Cu(II) complexes with HL
n
are shown to undergo oxidative dehydrogenation to form the corresponding metal salicyl-aldiminates. This reaction can occur on heating in the absence of oxygen and is accompanied by the Cu2+ Cu+ transition. 相似文献
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