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Title: Electron spin resonance spectral studies on copper(II) sulphate complexes with some nitrogen donor ligands
Authors: Ahuja, I S
Tripathi, Shailendra
Issue Date: Dec-1991
Publisher: NISCAIR-CSIR, India
Abstract: The complexes formed by the interaction of 2-,3- and 4-cynanoanilines (CA) and cyanopyridines (CP) with copper(II) sulphate have been studied employing ESR spectroscopy in solid and DMF solution states. The spectra of the complexes studied are almost comparable suggesting the same local symmetry for them. Analysis of the polycrystalline ESR data reveals axial symmetry for all the complexes with negligibly small Cu-Cu interactions and copper(II) ion in a tetragonally elongated octahedral environment with D4h or a little lower symmetry. The study shows the interaction of solvent molecules with copper(II) ion in the axial plane. Various spin-Hamiltonian parameters calculated from the ESR data indicate the presence of unpaired electron in the dx2-y2 orbital of the copper(II) ion. In addition, bonding parameters characterizing the covalency have also been calculated from the ESR data and analysed.
Page(s): 1060-1063
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.30A(12) [December 1991]

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