Two kinds of ion-paired iron and cobalt complexes ligated by 2-(benzimidazolyl)-6-(1-(arylimino)ethyl)pyridyl [iron (1a) and cobalt (1b)] or N-(pyridin-2-yl)methylene)-quinolin-8-amine (iron, 2a) were synthesized and well characterized by IR, EA and X-ray diffraction analysis. They were confirmed to be in the form of [ML2]2+[MCl4]2-or [ML2]2+2[MCl4]1-and the cations took octahedral coordinated geometry. Structure research indicated that complex 1a was in low-spin state while complex 1b was in high-spin state. Furthermore, their magnetic susceptibility measurements were performed and the complexes showed interesting magnetic properties. © 2008 Elsevier B.V. All rights reserved.
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