A non-innocent pincer H3LONS ligand and its corresponding octahedral low-spin Fe(III) complex formation via ligand-centric homolytic S–S bond scission

In the presence of FeCl3 and Et3N, a ligand H4Ldtda(AP) underwent S–S bond cleavage and generated a pincer non-innocent H3LONS ligand, which formed a homoleptic, six-coordinate, low-spin Fe(III) complex (1). The complex comprised two 2-iminobenzosemiquinone (1−) π-radicals and one thiyl π-radical.