Abstract

Y. K. Meshram and M. L. Narwade

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.

pyrazoline; hydroxy methyl; ligand

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