We report the synthesis, structural characterization, and multifunctional properties of three new iron (II) spin-crossover (SCO) complexes based on the azo-functionalized ligand 2-4-trans-phenyldiazenyl-pyridine-2-yl-1H-benzimidazole (L): Fe (L) 3 (ClO4) 2·C3H6O (1), (Fe (L) 3 (CF3SO3) 2 (2) and Fe (L) 3 (BF4) 2·C6H14O (3). . . .
Čierny et al. (Thu,) studied this question.