Transition metal ion complexes of thiosemicarbazones derived from 2-acetylpyridineN-oxide. Part IV. Iron(III) and copper(II) complexes of the4 N-ethyl- and4 N-diethylthiosemicarbazones

Summary Copper(II) and iron(III) complexes of 2-acetylpyridineN-oxide⁴N-ethyl- and⁴N-diethylthiosemicarbazones have been prepared and characterized by physical and spectral methods. The⁴N-ethyl-derivative coordinates as a neutral, bidentate ligand with copper(II), and the⁴N-diethyl- as an anionic, tridentate ligand with both copper(II) and iron(III). The former ligand forms a mixed ligand complex (i.e., one neutral and one anionic ligand) with iron(III).