We review herein the synthesis and investigation of iron(II) coordination compounds with 1,2,4‐triazoles or tris(pyrazol‐1‐yl)methanes as ligands. Both groups of complexes demonstrate thermally induced spin crossover accompanied by thermochromism [pink (magenta) ↔ white color change]. Factors that influence the nature and temperature of the spin crossover are discussed.
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Лавренова et al. (2012) studied this question.