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Potentiometric Studies of Cu(II) Complexes with Some Schiff Bases

P. V. Dongarkadekar, M. B. Gaikwad, B. M. Dhoot and M. B. Swami


The present paper represents the systematic solution study of complex formation of Cu (II) ion with Schiff bases synthesized from substituted hydroxybenzaldehyde- L1 = {4-[(3, 5-diiodo-2- hydroxyphenyl)methylidine]amino}-1, 5-dimethyl-2-phenyl-1, 2-dihydro-3H-pyrazolone; L2 = {4-[(2- hydroxyphenyl) methylidine]amino}-1, 5-dimethyl-2-phenyl-1, 2-dihydro-3H-pyrazol-3-one and L3 = {4- [(5-iodo-2-hydroxy-3-nitrophenyl)methylidine]amino}-1,5-dimethyl-2-phenyl-1, 2-dihydro-3H-pyrazol-3- one have been studied at 30 ± 0.10C and 0.1 M ionic strength in 60% (v/v) ethanol-water medium. The stability constant of these complexes indicates the formation of 1 : 1 and 1 : 2 complexes with all the Schiff bases.


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