Collect. Czech. Chem. Commun. 1999, 64, 1111-1118

Competitive Extraction of Some Bases by Carbollylcobaltate Anion from Water Into Chloroform

Oldřich Navrátil*, Zdeněk Skaličan, Zbyněk Kobliha and Emil Halámek

Department of Chemistry, The Military College of Ground Forces, 682 03 Vyškov, Czech Republic


The bis[undecahydro-7,8-dicarbaundecaborato(2-)]cobaltate(1-) (X-) has been used for complementary study of its ionic associates with some cations of organic bases and quaternary salts. For the optimization of present analytical methods, quinuclidin-3-yl hydroxy(diphenyl)acetate, 1-(1-phenylcyclohexyl)piperidine, dibenzo[b,f][1,4]oxazepine and cocaine, were studied by competitive extraction method. X- labelled with 60Co was used as carrier anion, triphenylmethane and azo dyes as competitive anions. The aqueous phase was 0.1 and 0.01 M HCl, the organic phase was chloroform. A comparison was made with earlier results obtained by extraction spectrophotometry.

Keywords: Competitive liquid extraction; Ionic associates; Nitrogen bases; Dicarbollylcobaltate anion; Alkaloids; Carboranes.