Abstract
The formation constants of ternary mixed ligand complex compounds formed from Cu(II)-2,2′-bipyridyl (bipy) with N-(para-substituted phenyl) glycines (pRPhG), Cu(II)-1,10-phenanthroline (phen) with N-(meta-substituted phenyl) glycines (mRPhG), Cu(II)-bipy/phen with some α-aminoacids (αA) have been determined by pH method at 25°C in the presence of 0.10 M NaClO4. It was found that linear free energy relationships do exist between the stability of ternary complex compounds and the base strengths of the ligands in all four ternary systems investigated. The stability of the ternary complex compounds was discussed in terms of ΔlogKM and log X values. It was found again that linear relationships exist between Δ log KM, log X and pK2 in the Cu(II)-phen-mRPhG ternary system.
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