The charge d. of phenolic oxygen and oximido nitrogen obtained by the HMO method plays an important role in copper extration by the title compounds The relation between chem. structure and extration properties was evaluated; pKa was not important with the 15 title compounds prepared The structural effect was rationalized by the formation of the stable square planar coordination compound

Key words: STRUCTURE PARAMETER, AROMATIC HYDROCARBON, COPPER, TRANSFORM, EXTRACTION, EQUILIBRIUM CONSTANT, OXIME, REGRESSION ANALYSIS, STRUCTURE AND PROPERTY CORRELATION, MOLECULAR ORBITAL THEORY