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Title: Homoleptic versus heteroleptic formation of mononuclear Fe(II) complexes with tris-imine ligands
Author: Barrios Moreno, Leoní Alejandra
Bartual-Murgui, Carlos
Peyrecave-Lleixà, Eugènia
Le Guennic, Boris
Teat, Simon J.
Roubeau, Olivier
Aromí Bedmar, Guillem
Keywords: Cetones
Estructura cristal·lina (Sòlids)
Layer structure (Solids)
Issue Date: 14-Apr-2016
Publisher: American Chemical Society
Abstract: 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 lowspin (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 singlecrystal- to-single-crystal transformation. This guest extrusion process is accompanied by a spin switch, from HS to LS.
Note: Versió postprint del document publicat a:
It is part of: Inorganic Chemistry, 2016, vol. 55, p. 4110-4116
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ISSN: 0020-1669
Appears in Collections:Articles publicats en revistes (Química Inorgànica i Orgànica)

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