Chemistry Letters, Vol.33, No.3, 350-351, 2004
A tripodal ligand containing three imidazole groups inducing spin crossover in both Fe(II) and Fe(III) complexes; Structures and spin crossover behaviors of the complexes
A tripodal hexadentate ligand containing three imidazole groups gives spin-crossover iron complexes in both the +II and the +III oxidation states. The tetrafluoroborate salt of the Fe(II) complex shows a gradual spin transition in the temperature range 110-270 K. The corresponding Fe(III) complex shows a spin transition above 150 K, and at 300 K ca. 87% of the Fe(III) ion is in the high-spin state.