Nickel(II) and copper(I) or copper(II) complexes of thiosemicarbazones derived from 3- and 4-formylpyridine (H3FPT and H4FPT) and 3- and 4-acetylpyridine (H3APT and H4APT) have been prepared and characterized by microanalyses, molar conductivity and magnetic susceptibility measurements and by their NMR (in the case of copper(I) and diamagnetic nickel(II) complexes) and IR spectra.
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Lima et al. (1999) studied this question.