Specificity of Interionic Interaction As a Factor in the Selective Extraction of “Soft” Anions from Aqueous Media Using 2(4)-Octylaminopyridines
摘要
Abstract
The specificity of interionic interaction in associates with inorganic anions is discussed, based on results from physical studies of 2(4)-octylaminopyridine (2(4)-OAP) salts and their distribution in a water–chloroform two-phase system. The redistribution of electron density in the aromatic cation as a function of the nature of the anion is attributed to observed violations of the order of anion exchange extraction and the selectivity of the extraction of “soft” anions (according to Pearson) with 2(4)-OAPs from aqueous media.