STRUCTURE AND SPIN CROSSOVER IN AN IRON(II) COMPOUND WITH tris(PYRAZOL-1-YL)METHANE AND THE COMPLEX Eu(dipic)2(Hdipic)]2- ANION
O. G. Shakirova1, L. G. Lavrenova2,3, E. V. Korotaev2, N. V. Kuratieva2,3, F. A. Kolokolov4, A. B. Burdukov2
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
4Kuban State University, Krasnodar, Russia
Keywords: координационное соединение, железо(II), трис(пиразол-1-ил)метан, комплексный анион [Eu(dipic)(Hdipic)], спин-кроссовер, термохромизм, coordination compound, iron(II), tris(pyrazol-1-yl)methane, complex [Eu(dipic)(Hdipic)]anion, spin crossover, thermochromism
Abstract
An iron(II) complex with tris(pyrazol-1-yl)methane (HC(Pz)3) of the composition [Fe(HC(Pz)3))2]xEu(dipic)2(Hdipic)]x2H2O, containing an outer-sphere complex anion, is synthesized. The compound is examined by single crystal and powder X-ray diffraction, UV-Vis and IR spectroscopies, and static magnetic susceptibility. The investigation of the temperature dependence χ(T) in the temperature range 80-470 K reveals that the polycrystalline phase of the compound undergoes spin-crossover 1А1 <=> 5Т2. The transition is accompanied by thermochromism (color change pink <=> white).
|
