Spin-crossover behavior in a new series of iron (II) compounds based on the ligand 5-(2-pyridyl)-1,2,4-triazole
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The title ligand (hereafter LL), is found to form an exciting new series of pseudo-octahedral Fe(II) compounds with formula Fe(LL)3X2. N Solvent, which exhibit conveniently studied spin-crossover transformations between nominal5T and1A states of Fe(II). Mössbauer spectra indicate that the spin-crossover transformations for these new systems are probably of the continuous type. There is considerable variation in the degree of conversion to low spin with decreasing temperature depending on gegen ion, solvation and/or location of methyl substituent on the triazole - ligand. The Mössbauer spectra for particular complexes in this group show an absence of both noticeable hysteresis and mechanical grinding effects.
KeywordsIron Methyl Thin Film Triazole Methyl Substituent
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