| Diluenta |
log Kex |
log Kex± |
log KD,A |
log K2,org
(Iorg)b |
| oDCBz |
4.31 ± 0.07
4.21 ± 0.07e |
-3.03 ± 0.24
-3.26 ± 0.10e |
-5.49 ± 0.13
-4.24 ± 0.34e |
7.34 ± 0.25
(2.6 ´ 10-8)
7.46 ± 0.12e
(1.6 ´ 10-7) |
| BBze |
4.38 ± 0.08 |
-2.67 ± 0.37 |
-4.64 ± 0.20 |
7.05 ± 0.37
(7.7 ´ 10-8) |
| DBE |
4.25 ± 0.36 |
-3.26 ± 0.31 |
-5.07 ± 0.45 |
7.51 ± 0.47
(3.2 ´ 10-8) |
| NB |
6.14 ± 0.06 |
2.25 ± 0.14 |
-2.35 ± 0.05 |
1.89 ± 0.15
3.3 ´ 10-5) |
| Diluenta |
log KD,MLA2 |
log Kex,ip |
log K1K2c
(I )b |
log KD,Ld |
| oDCBz |
-3.73, -3.74e |
3.23, 3.13e |
6.96
(0.012),
6.86e (0.025) |
-1.13 |
| BBze |
-3.55 |
3.31 |
6.86
(0.026) |
-1.12 |
| DBE |
-5.51 |
1.53 |
7.04
(0.0058) |
-2.77 |
| NB |
-1.79 |
5.19 |
6.98
(0.011) |
-1.00 |
aAbbreviations of the diluents are as follows: o-dichlorobenzene (oDCBz);
bromobenzene (BBz); di butyl ether (DBE); nitrobenzene (NB). bAverage ionic
strength values for the o and w phases: mol dm-3 unit. The Iorg values were calculated
from Iorg≈ (1/2) ([MLA+]o+[A−]o)=[A−]o=[MLA+]o{>>(1/2)(4[M2+]o+4[ML2+]o+[MA+]o)}.
c K1K2 is defined as [CdLPic2]/[CdL2+][Pic−]2 and was calculated from the K1K2 value
at I→ 0 reported before [10]. d[14]. eValues obtained from extraction experiments
which were performed by using mixtures of Cd2+ with an excess amount of HPic in
the presence of SO4
2 in the w phase at pH=2.00-2.90. |
