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Esr studies on complexes of copper ii with o phenolic oximes


, : Esr studies on complexes of copper ii with o phenolic oximes. Polyhedron 1(7-8): 607-610

Copper(II) forms 1:2 complexes with o-hydroxyacetophenone-, resacetophenone-, peonol- and 2-hydroxy-1-naphthaldoximes. Thermogravimetric analysis indicate that all the chelates are anhydrous. All the complexes are nonelectrolytes in nitrobenzene. Magnetic and electronic spectral data show planar geometry for all the complexes. Based on ESR studies all possible parameters were determined. The g, A and G values for all the complexes are consistent with the fact that copper is involved in a square planar coordination with oxime ligands. The metal-ligand bonding parameters evaluated showed substantial in plane .sigma.-bonding covalency and a small amount of in-plane as well as out-of-plane .pi.-bonding. [Oximes have various insecticidal, miticidal and nematocidal activities. They were employed as antidotes against organophosphorus poisons.].

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