FeIII in the High-Spin State in Dimethylammonium Bis[3-Ethoxysalicylaldehyde Thiosemicarbazonato(2–)-Κ3 O 2,N 1,S]ferrate(iii)

The synthesis and crystal structure (100 K) of the title compound, [(CH3)(2)NH2]-[Fe(C10H11O2N3S)(2)], are reported. The asymmetric unit consists of an octahedral [Fe-III (L)(2)](-) fragment, where L2- is 3-ethoxysalicylaldehyde thiosemicarbazonate(2), and a dimethylammonium cation. Each L2- ligand binds with the thiolate S, the imine N and the phenolate O atoms as donors, resulting in an (FeS2N2O2)-S-III chromophore. The ligands are orientated in two perpendicular planes, with the O and S atoms in cis positions, and mutually trans N atoms. The FeIII ion is in the high-spin state at 100 K. The variable-temperature magnetic susceptibility measurements (5-320 K) are consistent with the presence of a high-spin Fe-III ion with D = 0.83 (1) cm(-1) and g = 2.