Homoleptic versus Heteroleptic Formation of Mononuclear Fe(II) Complexes with Tris-Imine Ligands
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https://figshare.com/articles/dataset/Homoleptic_versus_Heteroleptic_Formation_of_Mononuclear_Fe_II_Complexes_with_Tris_Imine_Ligands/3172873
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资源简介：
We show a marked tendency of Fe(II)
to form heteroleptic [Fe(L)(L′)](ClO4)2 complexes from pairs of chelating tris-imine 3bpp, tpy, or 2bbp
ligands. New synthetic avenues for spin crossover research become
thus available, here illustrated with three new heteroleptic compounds
with differing magnetic behaviors: [Fe(H4L1)(Cl-tpy)](ClO4)2·C3H6O (1), [Fe(H2L3)(Me3bpp)](ClO4)2·C3H6O (2), [Fe(H4L1)(2bbp)](ClO4)2·3C3H6O (3). Structural studies demonstrate that 1 is in the low-spin
(LS) state up to 350 K, while complexes 2 and 3 are, by contrast, in the high-spin (HS) state down to 2 K, as corroborated
through magnetic susceptibility measurements. Upon exposure to the
atmosphere, the latter exhibits the release of three molecules of
acetone per complex, turning into the solvent-free analogue [Fe(H4L1)(2bbp)](ClO4)2 (3a),
through a single-crystal-to-single-crystal transformation. This guest
extrusion process is accompanied by a spin switch, from HS to LS.
创建时间：
2016-08-04
