Liquidliquid extraction of metal ions by the sulfide podand 1,12-di-2-thienyl-2,5,8,11-tetrathiadodecane

✍ Scribed by Elwira Lachowicz; Andrezej Krajewski; Mirosław Goliński

• Book ID: 104100383
• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 459 KB
• Volume: 188
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(00)86047-x

✦ Synopsis

The sulfide podand (an open-chain neutral multidentate ligand with six sulfur donor atoms) 1,12-di-2-tbienyl-2,5,8,lltetrathiadodecane (TTD) was synthesized. Its extracting properties were examined with 1,2-dichloroethane and 4-methylpentan-2-one as solvents. The reagent showed high selectivity for silver(I) and copper(I) ions; mercury(I1) was extracted (ca. 97%) under certain conditions. Extraction of silver(I) was studied in detail with **omAg tracer. Log D values >2 were obtained for the range from pH 6 (with perchlorate as counter-ion) to 2 M perchloric acid or 6 M nitric acid. The ratio of Ag:TTD in the complex was 1:l. Silver could be back-extracted with 4-6 M hydrochloric acid.