Reactions between different copper(II) salts and 2-pyridineformamide thiosemicarbazone (HAm4DH) in neutral ethanolic media led to the formation of complexes with the formulae [Cu(HAm4DH)X 2 ] (X = Cl or Br) (1, 2) and [Cu-(HAm4DH) 2 ]X 2 (X = NO 3 or ClO 4 ) (3, 4). The same reactions carried out in the presence of triethylamine gave rise to new complexes with the general formulae [Cu(Am4DH)X] (X = Cl, Br, AcO, or NO 3 ) (5-8), [Cu(H 2 O)(Am4DH)](ClO 4 ) (9), and [Cu(Am4DH) 2 ] (10), many of which were isolated with different molecules of crystallization and contain a deprotonated thiosemicarbazone (Am4DH). These complexes were characterized by elemental analysis, and different spectroscopic and magnetic techniques. The thermal and redox behavior of the complexes was also evaluated. Complexes 1, 2,