Studies in stability constants of Nd (III) and Sm (III) metal ion complexes with substituted pyrazoline, pH-metrically

Author(s)	Mr. Syed Saad Anwar Syed Sajjad Zaheer Syed, Dr. Rajesh D Deshmukh, Dr. Mohd. Wajid Shaikh Mohd. Waris
Country	India
Abstract	In this work, we investigated the proton-ligand and metal-ligand stability constants of ligand 3-(2-hydroxy-5-methylphenyl)- 5,5-diphenyl-1-phenyl-Δ2-pyrazoline (L1) with inner transition metal ions such as Nd (III) and Sm (III), determined pH-metrically at 0.1 M ionic strength. (30±10°C) in a 70% dioxane-water mixture by the Bjerrum method as adopted by Calvin Wilson. 1:1 and 1:2 complexes were formed between 3-(2-hydroxy-5-methylphenyl)- 5,5-diphenyl-1-phenyl-Δ2-pyrazoline (L1) and Nd (III) and Sm (III). We evaluated and compared the pK and log k values with the resulting data.
Keywords	Substituted Pyrazoline, Dioxane – water mixture, stability constant.
Field	Chemistry
Published In	Volume 7, Issue 5, September-October 2026
Published On	2026-10-30

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