Stability Constant of Cobalt (II), Nickel (II) and Copper (II) Chelates with Some Substituted Pyrazolines

Y. K. Meshram and M. L. Narwade

Department of Chemistry, G. S. College, Khamgaon - 444 303 India.

ABSTRACT:

The interaction of Co(ll), Ni(ll) and Cu(ll) metal ions with 3{2-hydroxy-5-methyl phenyl) 5-phenyl pyrazoline (ligand 1) and 3(2hydroxy-3-nitro-5methyl)phenyl)-5-phenyl pyrazoline (ligand 2) and 3(2-hydroxy-3-bromo-5-methyl phenyl) 1,5 Diphenyl pyrazoline (ligand 3) have been investigated by pH metric technique at 0.1 M ionic strength and 27±0.1°C in 70% diozame water mixture. The data obtained were used to estimate the values of proton-ligand stability constant (pk) and metal ligand stability constants (log k). It is observed that Co(ll), Ni(II), and Cu(ll) metal ions formed 1:1 and 1:2 complexes with all the three ligands.

KEYWORDS:

pyrazoline; hydroxy methyl; ligand

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Copy the following to cite this article: Meshram Y. K, Narwade M. L. Stability Constant of Cobalt (II), Nickel (II) and Copper (II) Chelates with Some Substituted Pyrazolines. Orient J Chem 1999;15(1).

Copy the following to cite this URL: Meshram Y. K, Narwade M. L. Stability Constant of Cobalt (II), Nickel (II) and Copper (II) Chelates with Some Substituted Pyrazolines. Orient J Chem 1999;15(1). Available from: http://www.orientjchem.org/?p=37004