Formation Constants of Some Bivalent and Trivalent Transition Metal Chelates of Schiff Base Derived From 4-Carboxaldehyde-1- (2’,4’-Dinitrophenyl)-3-Methyl-2-Pyrazolin-5-One and 4-Bromo Aniline
1J and J College of Science, Nadiad ,
2Maninagar Science College, Ahmedabad,
3M.B. Patel Science College, Anand,
4Navjivan Science College, Dahod (India)
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ABSTRACT:Potentiometric studies have been carried out on metal chelates of Cu+2, Ni+2, Co+2 and Cr+3 with schiff-base derived from 4-carboxaldehyde-1-(2’,4’-dinitrophenyl)-3-methyl-2-pyrazolin-5-one with 4-bromo aniline. The dissociation constants of ligand and formation constants of its metal chelates have been determined by Calvin-Bjerrum pH titration technique, as adopted by Irving and Rossotti at 30±0.5°C and at ionic strength of 0.1M in 70:30 (v/v) dioxane-water medium.
KEYWORDS:Potentiometric studies; formation constants; chelates; schiff bases
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