TITLE

# Solvent extraction of microamounts of cesium into nitrobenzene using ammonium and thallium dicarbollylcobaltates in the presence of 2,3-naphtho-15-crown-5

AUTHOR(S)
Makrlík, E.; Vaňura, P.; Selucký, P.
PUB. DATE
September 2009
SOURCE
Journal of Radioanalytical & Nuclear Chemistry;Sep2009, Vol. 281 Issue 3, p547
SOURCE TYPE
DOC. TYPE
Article
ABSTRACT
Extraction of microamounts of cesium by a nitrobenzene solution of ammonium dicarbollylcobaltate $$( {{\text{NH}}_{ 4}^{ + } {\text{B}}^{ - } })$$ and thallium dicarbollylcobaltate $$( {{\text{Tl}}^{ + } {\text{B}}^{ - } })$$ in the presence of 2,3-naphtho-15-crown-5 (N15C5, L) has been investigated. The equilibrium data have been explained assuming that the complexes $${\text{ML}}^{ + }$$ and $${\text{ML}}_{ 2}^{ + }$$ $$( {{\text{M}}^{ + } = {\text{NH}}_{4}^{ + } ,{\text{Tl}}^{ + } ,{\text{Cs}}^{ + } } )$$ are present in the organic phase. The stability constants of the $${\text{ML}}^{ + }$$ and $${\text{ML}}_{2}^{ + }$$ species $$( {{\text{M}}^{ + } = {\text{NH}}_{4}^{ + } ,{\text{Tl}}^{ + } })$$ in nitrobenzene saturated with water have been determined. It was found that the stability of the complex cations $${\text{ML}}^{ + }$$ and $${\text{ML}}_{2}^{ + }$$ $$({{\text{M}}^{ + } = {\text{NH}}_{4}^{ + } ,{\text{Tl}}^{ + } ,{\text{Cs}}^{ + } ;\;{\text{L}} = {\text{N}}15{\text{C}}5})$$ in the mentioned medium increases in the $${\text{Cs}}^{ + }\,<\, {\text{NH}}_{4}^{ + }\,<\,{\text{Tl}}^{ + }$$ order.
ACCESSION #
44513647

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