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New high-spin iron complexes based on bis(imino)acenaphthenes (BIAN): synthesis,structure, and magnetic properties |
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| Authors: | I. L. Fedushkin A. A. Skatova N. M. Khvoinova A. N. Lukoyanov G. K. Fukin S. Yu. Ketkov M. O. Maslov A. S. Bogomyakov V. M. Makarov |
| Affiliation: | 1. G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 ul. Tropinina, 603950, Nizhny Novgorod, Russian Federation 2. International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 3A ul. Institutskaya, 630090, Novosibirsk, Russian Federation 3. Kozma Minin Nizhny Novgorod State Pedagogical University, 1 ul. Ulyanova, 603005, Nizhny Novgorod, Russian Federation |
| Abstract: | The reactions of iron diiodide with one and two equivalents of the monopotassium salt of 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene (dpp-BIAN) in diethyl ether gave the complexes [(dpp-BIAN)FeI]2 (1) and (dpp-BIAN)2Fe (2), respectively. The bis-ligand complex (tms-BIAN)2Fe (3) was synthesized by the exchange reaction of the monosodium salt of 1,2-bis(trimethylsilylimino)acenaphthene (tms-BIAN) with iron diiodide. The reaction of FeI2 with tms-BIAN affords the chelate complex (tms-BIAN)FeI2 (4), whereas the reaction of FeBr2·2H2O with tms-BIAN is accompanied by elimination of trimethylsilyl groups to form the tris-ligand acenaphthene-1,2-diimine complex [(H2BIAN)3Fe][FeBr3·THF]2 (5) containing two types of iron ions. Compounds 1–5 were characterized by IR spectroscopy and elemental analysis. The molecular structures of 1–5 were determined by single-crystal X-ray diffraction. For high-spin complexes 1–3, the temperature-dependent magnetic susceptibilities were measured in the range of 4–300 K. |
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