Abstract

The effects of the phenyl substituent on the dimerization of copper(II) carboxylate in the solvent extraction of copper(II) with phenylacetic acid using benzene and 1-octanol as a solvent were investigated, at 25° and at the aqueous ionic strength of 0.1 M (NaClO 4). The dimerization of copper(II) phenylacetate has been found to be written as: 2CuA 2 ▪Cu 2A 4 in 1-octanol, and 2CuA 2(HA) 2 ▪Cu 2A 4(HA) 2 + (HA) 2 in benzene, with the dimerization constants, log K ▪ = 2.24 and log K ▪ = 4.19, respectively. It was proved that the phenyl group inhibits the formation of the dimeric copper(II) phenylacetate, and its effect is partially shielded by a methylene substituent.

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