Magnetic properties of iron(II) and cobalt(II) complexes of tetrakis(2-pyridyl)methane. Spin-crossover behavior in the cobalt(II) complex

Iron(II) and cobalt(II) mononuclear metal complexes with tetrakis(2-pyridyl)methane have been synthesized and characterized. A gradual spin-crossover to the high-spin state above 300 K is observed in the cobalt(II) complex while the iron(II) complex exhibits no spin transition to the high-spin state between 5 and 400 K.

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