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

Author(s): 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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