title: Liquid-liquid distribution of ion associates of hexabromotellurate (IV) with quaternary ammonium counter ions.
abstract: The distribution behavior of ion associates (Q(+))(2). TeBr(6)(2-) of TeBr(6)(2-) with quaternary ammonium cations (Q(+)) between aqueous phase and two organic phases (1,2-dichloroethane (DCE) and chloroform (CF)) was examined, and the extraction constants (log K(ex)) were determined. The extractability with long-chain alkyltrimethylammonium cations (group I) is greater than that with symmetrical tetraalkylammonium cations (group II) in the 1,2-dichloroethane extraction system and the difference in log K(ex) for two cations (one of each type) with the same number of carbon atoms was about 3 on the average. The contributions of a methylene group in the cations of groups I and II to log K(ex) were found to be 0.43 approximately 1.10 and about 0.74 on the average. Among the ion associates examined, the extractability of the extracting solvent was in the DCE>CF; the difference in log K(ex) was about 5 on the average.
authors.affiliation: Department of Materials Science, Yonago National College of Technology 4448, Hikona-cho, Yonago-shi, Tottori 683, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Yamamoto
authors.forename: K
authors.initials: K
authors.lastname: Adachi