Synthesis and Spin State of the Iron(II) Complex with the N,N'-Disubstituted 2,6-Bis(pyrazol-3-yl)pyridine Ligandстатья
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Дата последнего поиска статьи во внешних источниках: 9 апреля 2021 г.
Аннотация:The reaction of a new tridentate ligand 2,6-bis(5-tert-butyl-1-(2,6-dif luorophenyl)-1H-pyrazol-3-yl)pyridine (L) with the divalent iron salt affords the iron(II) complex [Fe(L)2](BF4)2 (I), which is isolatedin the individual state and characterized by elemental analysis, NMR spectroscopy, and X-ray diffractionanalysis. According to the X-ray diffraction results and data of the Evans method, which makes it possible todetermine the spin state of paramagnetic compounds in a solution from the NMR spectra, the iron(II) ion incomplex I exists in the high-spin state (S = 2 for Fe(II)) and undergoes no temperature-induced spin transi-tion in a range of 120–345 K