Stability Constants of Some Univalent Cation Complexes of 2,3-Naphtho-15-crown-5 in Nitrobenzene Saturated with Water
The extraction of micro amounts of cesium by nitrobenzene solutions of sodium, potassium and rubidium dicarbollylcobaltates (M + B − ;M + =Na + ,K + ,Rb + ) has been investigated in the presence of 2,3-naphtho-15-crown-5 (N15C5, L). The equilibrium data were explained by assuming that ML + and ML 2...
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Published in | Journal of solution chemistry Vol. 38; no. 9; pp. 1129 - 1138 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Boston
Springer US
01.09.2009
Springer |
Subjects | |
Online Access | Get full text |
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Summary: | The extraction of micro amounts of cesium by nitrobenzene solutions of sodium, potassium and rubidium dicarbollylcobaltates (M
+
B
−
;M
+
=Na
+
,K
+
,Rb
+
) has been investigated in the presence of 2,3-naphtho-15-crown-5 (N15C5, L). The equilibrium data were explained by assuming that ML
+
and ML
2
+
complexes (M
+
=Na
+
,K
+
,Rb
+
, Cs
+
; L=N15C5) were present in the organic phase. The stability constants of the complex species ML
+
and ML
2
+
have been determined in nitrobenzene saturated with water. It was found that the stability of the complex cation ML
+
(where M
+
=Na
+
,K
+
,Rb
+
, Cs
+
; L=N15C5) in water-saturated nitrobenzene solutions increases along the series Cs
+
<Rb
+
<K
+
<Na
+
, whereas that of the species ML
2
+
in the same medium increases in the order Cs
+
<Rb
+
<Na
+
<K
+
. |
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ISSN: | 0095-9782 1572-8927 |
DOI: | 10.1007/s10953-009-9434-z |