Extraction of strontium using sodium dicarbollylcobaltate in the presence of 15-crown-5

Authors
Dankova, M Makrlik, E Vanura, P
Citation
M. Dankova et al., Extraction of strontium using sodium dicarbollylcobaltate in the presence of 15-crown-5, ACH-MODEL C, 137(1), 2000, pp. 133-137
Citations number
10
Categorie Soggetti
Chemistry
Journal title
ACH-MODELS IN CHEMISTRY
ISSN journal
12178969 → ACNP
Volume
137
Issue
1
Year of publication
2000
Pages
133 - 137
Database
ISI
SICI code
1217-8969(2000)137:1<133:EOSUSD>2.0.ZU;2-9
Abstract
From extraction experiments with Na-22 as a tracer, the extraction constant corresponding to the equilibrium Sr2+(aq) + (NaL+)-Na-2(nb) reversible arr ow SrL22+(nb) + 2Na(+)(aq) taking place in the two-phase water-nitrobenzene system (L = 15-crown-5; aq = aqueous phase, nb = nitrobenzene phase) was e valuated as logK(ex)(Sr2+, 2NaL(+)) = 1.9+/-0.1. Further, the stability con stant of the complex SrL22+ in nitrobenzene saturated with water was calcul ated for a temperature of 25 degrees C: log beta(nb)(SrL22+) = 15.2+/-0.1.