Abstract
Abstract The extraction of copper(II) with o-, m-, and p-methylbenzoic acids in 1-octanol was carried out at 25 °C and aqueous ionic strength of 0.1 mol dm−3 (NaClO4). In contrast to the extraction with benzoic acid, in which only the monomeric copper(II) benzoate is extracted, the dimeric copper(II) species is also responsible for the extraction of copper(II) with o- and m-methylbenzoic acids in 1-octanol together with the monomeric one. On the other hand, p-methylbenzoic acid has a poorer extracting capability than o- and m-methylbenzoic acids and only the monomeric copper(II) species is responsible for the extraction.
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