Liquid-Liquid Extraction of Some Class b Metal Ions with a Thiacrown Compound, 1,4,7,10,13,16-Hexathiacyclooctadecane

Article abstract of DOI:10.1246/bcsj.61.1587

The liquid-liquid extraction of various metal ions, especially of soft class b metal ions with a thiacrown compound, 1,4,7,10,13,16-hexathiacyclooctadecane (HTCO) using picrate ion (Pic^-) was examined and compared with that of 1,4,8,11-tetrathiacyclotetradecane (TTCT).Although the extraction behavior of the class a, ab, and b metals with HTCO is fundamentally similar to that with TTCT, that of some metals belonging to class b metals with HTCO is different from that with TTCT.The extraction percentages of copper(II) and palladium(II) with HTCO are a few times larger than those with TTCT.Copper(I) and silver(I) are extracted with HTCO as the 1:1 complexes such as ⁺Pic^- and ⁺Pic^-, respectively, regardless of the relative concentration of the ligand to the metal.On the other hand, copper(I) and silver(I) complexes with TTCT are extracted with different compositions dependenig upon the relative concentration of the ligand to the metal.