期刊
JOURNAL OF MOLECULAR STRUCTURE
卷 990, 期 1-3, 页码 110-120出版社
ELSEVIER
DOI: 10.1016/j.molstruc.2011.01.024
关键词
Bidentate Schiff base ligands; Cu(II) complexes; Acyl pyrazolone; Crystal structures
资金
- University Grants Commission, New Delhi
- Alembic Research Fellowship
We depict the synthesis of a new set of six bidentate heterocyclic Schiff base ligands, formed by the condensation of three different 4-toluoyl pyrazolones with various aromatic amines in ethanolic medium. All of these ligands have been characterized on the basis of elemental analysis, IR, H-1 NMR, C-13 NMR and Mass spectral data. The molecular geometries of three of these ligands have been determined by single crystal X-ray study. It reveals that these ligands exist in amine-one tautomeric form in the solid state. The reaction of these ligands with copper(II) resulted in the formation of mononuclear complexes having the general composition [CuL2(H2O)(2)] with two water molecules at axial positions. These complexes have been characterized on the basis of elemental analysis, Cu-estimation, molar conductivity, magnetic measurements, IR, UV-Visible, FAB-Mass, TG-DTA-DSC data, cyclic voltametric measurements and ESR spectral studies. ESR spectra and magnetic susceptibility measurements indicates distorted octahedral stereochemistry of Cu(II) complexes, while non-electrolytic behaviour of complexes indicates the absence of counter ion. (C) 2011 Elsevier B.V. All rights reserved.
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