The determination of the stability constants of complexes of 1,2,4-triazoles and biologically relevant ligands with M(II) by potentiometric titration in aqueous solution M.M. Khalil, R. Mahmoud, M. Moussa, Journal of Coordination Chemistry, 65 (2012) 2028-2040.

ملخص البحث

Potentiometric equilibrium measurements have been performed at 250.1C and I¼0.10 moldm3 NaNO3 for the interaction of 1,2,4-triazole and M(II) [Cu, Co, Ni, and Zn] with some biologically important ligands (glycine, -alanine, DL-valine, n-valine, DL-leucine, serine, aspartic acid, histidine, and asparagine). Ternary complexes are formed by a stepwise mechanism. The relative stabilities of the ternary complexes are compared with those of the corresponding binary complexes in terms of DlogK, logX, and % R.S values. The concentration distribution curves of the various binary and ternary species in a solution were evaluated as a function of pH.

الكلمات المفتاحيه

Equilibriums; Binary complexes; Ternary complexes; Stability constants; Distribution curves