INFLUENCE OF THE ELECTRONIC AND SPATIAL STRUCTURE PARAMETERS ON THE SPIN-TRANSITION TEMPERATURE IN UNUSUAL CHAIN IRON(II) COMPLEXES

Using EXAFS, XANES and X-ray fluorescence spectroscopy it has been est ablished that the sharp spin crossover in a series of polynuclear comp lexes of iron(II) with triazole and aminotriazole is accompanied by co nsiderable changes in the spatial and electronic structure. The effect of electronic and structural parameters on the spin crossover tempera ture in compounds of iron(II) with aminotriazoles upon change of anion and upon magnetic dilution with zinc is discussed.