Study of Spin-Crossover in Iron(II) Complexes with 2,6-Bis(4,5-Dimethyl-1H-Imidazol-2-yl)Pyridine and closo-Borate Anions

Abstract New iron(II) coordination compounds with 2,6-bis(4,5-dimethyl-1 H -imidazol-2-yl)pyridine (L) and closo -borate(2–) anions [FeL 2 ]B 10 ⋅2H O 12 ⋅H have been synthesized. The identified studied by CHN analysis, electron spectroscopy (diffuse reflection spectroscopy), IR, Mössbauer, EXAFS spectroscopies, X-ray powder diffraction, static magnetic susceptibility. structures of the knots complexes has obtained modeling spectra. ligand is coordinated ion in a tridentate-cyclic manner two nitrogen atoms imidazole cycles atom pyridine to form FeN 6 knot. study temperature dependence susceptibility range 80–500 K showed that high-temperature spin-crossover 1 А ↔ 5 Т manifests itself compounds.