Collect. Czech. Chem. Commun. 1998, 63, 967-976

Extraction of Selected Organic Bases from Water into Chloroform by Means of the Cobaltacarborane Anion

Oldřich Navrátil, Zdeněk Skaličan, Zbyněk Kobliha and Emil Halámek

Department of Chemistry, Military Academy, 682 03 Vyškov, Czech Republic


The cobaltacarborane anion labelled with 60Co was used to study the solvent extraction and stability of its ion associates with a series of organic nitrogen base cations or quaternary salts, some of which are psychoactive. The aqueous phase was 0.1 M HCl, the organic phase was chloroform. The extraction constants of the ion associates were calculated. A method was devised for competitive extraction of ion associates with additional dye anions which are used in the extraction-photometric determination of selected bases.

Keywords: Extraction; Ion associates; Cobaltacarborane anion; Boranes; Carboranes; Amines; Quaternary ammonium salts; Alkaloids.