SPIN-CROSSOVER IN COORDINATION COMPOUNDS OF IRON(II) WITH tris(PYRAZOL-1-YL)METHANE AND CLUSTER ANIONS
O. G. Shakirova1, L. G. Lavrenova2,3, E. V. Korotaev2, L. A. Sheludyakova2,3, V. A. Varnek2, M. A. Shestopalov2,3, Yu. V. Mironov2,3
1Komsomolsk-on-Amur State Technical University, Komsomolsk-on-Amur, Russia 2Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia 3Novosibirsk National Research State University, Novosibirsk, Russia
Keywords: координационные соединения, железо(II), трис(пиразол-1-ил)метан, октаэдрические кластерные комплексы, спин-кроссовер, термохромизм, coordination compounds, iron(II), tris(pyrazol-1-yl)methane, octahedral cluster complexes, spin-crossover, thermochromism
Abstract
Synthesis procedures for new coordination compounds of iron(II) with tris(pyrazol-1-yl)methane (HC(pz)3), containing cluster anions in the outer sphere, of the composition [Fe{HC(pz)3}2][Mo6Cl14]×2H2O (I), [Fe{HC(pz)3}2][Mo6Br14]×H2O (II), and [Fe{HC(pz)3}2]2[Re6S8(CN)6]×2H2O (III) are developed. The compounds are studied by static magnetic susceptibility, electronic, IR, and Mössbauer spectroscopic methods. The magnetochemical study shows that in the polycrystalline phases of all compounds the spin-crossover 1 А 1 Û 5 - 2 is observed which is accompanied by thermochromism.
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