The present study includes important findings relating to the number of donor atoms, species of ligands, and stabilities of complexes. Stabilities of complexes between Cu(II) ion and NO-, NS-, ONS-, and ONO-type Schiff bases were compared. Acid-base properties of the Schiff bases were explained at 25±◦C and ionic strength (I) of M supported by NaCl. The Hyperquad computer program was used for calculation of dissociation and stability constants. |