studies on interaction between cu(ii), ni(ii) and co(ii) metal ions and hydroxy-substituted chalconeimines, at 0.1 m ionic strenghth ph metrically

The interaction of Cu(II),Ni(II) And Co(II) metal ions with 2-׀hydroxy -5-׀bromo-N- (Phenyl)chalconeimines (L1) and 2-׀hydroxy -5-׀Bromo – N- (O- nitro phenyl ) ֽ◌Chalconeimine (L2) have been studied at0.1 M ionic strength(26± 0.10 C)in 70% Dioxane- water mixture by Bjerrum method as adopted by Calvin Wilson.It is observed thatCu(II),Ni(II) And Co(II) metal ions form 1:1 and 1:2 complexes with ligands (L1 &L2). The data obtained were used to estimate and compare the value of proton- ligand stability constant (pK) and metal- ligand stability constant ( log k) The effect of substituent was studied from estimated data(pk &logk).