Stability Constant of Copper (Ii), Nickel (Ii) and Cobalt (Ii) Metal Ions with Substituted Pyrazole and Thiodiazoles Ph Metrically

P. B. Agarwal*, A.M. Diman, K.N. Wadodkar and M. L. Narwade

Department of Chemistry, Government V.M.V., Amravati - 444 604 India.

ABSTRACT:

Complex formation between Cu(ll), Ni(ll), and Co(ll) metal ions with methyl [-1-Phenyl-3-(2'-hydroxyphenyl)pyrazole-5-]-carboxylate (ligandl), 2-[3'-(2"-Hydroxy-5"-methylphenyl pyrazol-5'-yl)]-5-mercapto-1,3,4-thia diazole (ligand 2) and 2-[3"-Hydroxy-5"-methyl phenyl pyrazol'5"-yl)]-5-amino-1,3,4-thiadiazole (ligand 3) in 70% Ethanol-water mixture has been investigated pH metrically. It showed the formation of 1:1 and 1:2 complexes in the pH range of 2.5 to 5.5. The value of pk {proton-ligand stability constants) and log k (metal-ligand stability constants) at 0.1 M ionic strength and 27± 0.1 °C are calculated

KEYWORDS:

diazole (ligand; stability

Download this article as: 

Copy the following to cite this article: Agarwal P. B, Diman A. M, Wadodkar K. N, Narwade M. L. Stability Constant of Copper (Ii), Nickel (Ii) and Cobalt (Ii) Metal Ions with Substituted Pyrazole and Thiodiazoles Ph Metrically. Orient J Chem 2000;16(1).

Copy the following to cite this URL: Agarwal P. B, Diman A. M, Wadodkar K. N, Narwade M. L. Stability Constant of Copper (Ii), Nickel (Ii) and Cobalt (Ii) Metal Ions with Substituted Pyrazole and Thiodiazoles Ph Metrically. Orient J Chem 2000;16(1). Available from:http://www.orientjchem.org/?