Abstract:
A series of Fe (II) complexes, {[(tpma)Fe(-CN)]4}X4 (X = ClO4
–, BF4
–, and PF6
–; tpma = tris(2-pyridylmethyl)
amine) were prepared by reacting the {Fe(tpma)}2+ building block with (Bu4N)CN. All three complexes
exhibit gradual temperature-driven spin crossover (SCO) associated with the high-spin (HS) lowspin
(LS) transition at two out of four metal centers. The evolution of HS and LS Fe (II) ions with temperature
was followed by a combination of Mössbauer spectroscopy.
