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Original Articles

Chelation and extraction of copper(II) with 5-pyrazolone-based Schiff bases

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Pages 688-698 | Received 23 Jul 2010, Accepted 22 Nov 2010, Published online: 06 Feb 2011
 

Abstract

Copper(II) chelates of the Schiff bases (H2L), obtained by condensation of 4-butyryl-3-methyl-1-phenyl-pyrazoline-5-one (HBMPP) with o-phenylene diamine (H2L1) and p-phenylene diamine (H2L2), have been prepared and characterized by elemental analyses, thermogravimetric analyses, magnetic measurements, diffuse reflectance spectra, IR and mass spectra, and conductance measurements. The extractability of copper(II) with H2L in chloroform was examined. Effective extraction was observed with 1 × 10−3 mol dm−3 of ligands at pH 6.5 using H2L1 and pH 7.0 using H2L2. The nature of the extracted species was ascertained by the slope analysis method. The ligand can effectively be used in solvent extraction of copper(II) from aqueous phase to organic phase.

Acknowledgments

The authors wish to thank Dr H.S. Patel, Head, Department of Chemistry, for his constant encouragement and necessary facilities. One of the authors (NJP) gratefully acknowledges financial support from UGC, New Delhi, India, under UGC scheme of minor research project (letter no. F30-91/2004(SR), dated 28.10.2004).

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