Fe^III in a low-spin state in caesium bis­[3-ethoxysalicylaldehyde 4-methyl­thiosemicarbazonato(2-)-[kappa]³O²,N¹,S]ferrate(III) methanol monosolvate

The Fe^IIIS₂N₂O₂ chromophore contains two O,N,S-donating dianionic 3-ethoxysalicylaldehyde 4-methyl­thiosemicarbazonate(2-) ligands in perpendicular planes, with the O and S atoms in cis positions and the N atoms in trans positions. The Fe^III cation is in the low-spin state at 100 K.