Some Studies in Inorganic Complexes. XIV. Reactions of 2-Methyl-6-aminopyridine and 2-Thioamidopyridine with Some Transition Metal Ions

Abstract

The following complexes of the chelating ligands 2-methyl-6-aminomethylpyridine (6-methyl-2-picolylamine or mepic) and 2-thioamidopyridine (thiopic) have been prepared and studied: [Cu mepic₂X]X, where X = Cl, Br, I, NO₃, ClO₄, [Cu mepic₂C₂O₄], [Ni mepic₃][ClO₄]₂, [M(II) thiopic₃][ClO₄]₂, [M(III) thiopic₃][ClO₄]₃, (M(II) = Co, Ni; M(III) = CO, Fe), and [Co thiopic₃]Cl₂. Conductance measurements in ethanol, nitromethane, and nitrobenzene indicate that the [Cu mepic2X]X complexes are 5-covalent whilst the other complexes studied are 6-covalent. All the complexes are "spin free" excepting those of Co(III). Absorption spectra of the copper complexes in the near ultraviolet region were also made.