eng Oriental Scientific Publishing Company Material Science Research India 0973-3469 2011-05-24 8 1 131 136 2520 article Stability Constants of Lanthanide Metal Ions Chelates with Substituted Pyrazoles in Different Solvents G. H. Murhekar 1 A. R. Raut 1 R. S. Sonone 1 Department of Chemistry, Arts and Science College, Murtizapur, Dist. - Akola - 444 107, India.

The reaction of Pr (III) and Nd (III) metal ions with some substituted pyrazoles, at 0.1M ionic strength and at 30 ± 0.10C in 70% acetone-water mixture and 70% propanol-water mixture have been studied pH-metrically. The data obtained were used to estimate the values of proton-ligand (pK) and metal-ligand (logK) stability constants in different solvents. It is observed that the pK and logK values in 70% propanol-water mixture are grater than in 70% acetone -water mixture. Pr (III) and Nd (III) metal ions formed 1:1 and 1:2 complexes with all the ligands in both solvent medium.

 https://www.materialsciencejournal.org/vol8no1/stability-constants-of-lanthanide-metal-ions-chelates-with-substituted-pyrazoles-in-different-solvents/ Solvent effect Stability constants Chelates Substituted pyrazoles